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recover 1.3c
recover is a utility which automates some steps to undelete a file. more>>
Recover is a utility which automates some steps as described in the Ext2fs-Undeletion howto in order to recover a lost file.
Recover (ie. console version) is no longer under active development since bug reports have become rare (thus stable), newer and better FSs are coming up and I dont really know how recover could be improved. (suggestions are still welcome!)
If you want to undelete files on a non-ext2 linux partition, you should try it the UNIX-way!
Recover automates some steps as described in the ext2-undeletion howto. This means it seeks all the deleted inodes on your hard drive with debugfs. When all the inodes are indexed, recover asks you some questions about the deleted file. These questions are:
- Hard disk device name
- Year of deletion
- Month of deletion
- Weekday of deletion
- First/Last possible day of month
- Min/Max possible file size
- Min/Max possible deletion hour
- Min/Max possible deletion minute
- User ID of the deleted file
- A text string the file included (can be ignored)
If recover found any fitting inodes, he asks to give a directory name and dumps the inodes into the directory. Finally he asks you if you want to filter the inodes again (in case you typed some wrong answers).
We hope you will never need recover, but in case, its better to install this program anyway. Once a file is deleted, everytime something is written to disk, theres a change it will overwrite the old deleted file. You will never be able to restore it.
<<lessRecover (ie. console version) is no longer under active development since bug reports have become rare (thus stable), newer and better FSs are coming up and I dont really know how recover could be improved. (suggestions are still welcome!)
If you want to undelete files on a non-ext2 linux partition, you should try it the UNIX-way!
Recover automates some steps as described in the ext2-undeletion howto. This means it seeks all the deleted inodes on your hard drive with debugfs. When all the inodes are indexed, recover asks you some questions about the deleted file. These questions are:
- Hard disk device name
- Year of deletion
- Month of deletion
- Weekday of deletion
- First/Last possible day of month
- Min/Max possible file size
- Min/Max possible deletion hour
- Min/Max possible deletion minute
- User ID of the deleted file
- A text string the file included (can be ignored)
If recover found any fitting inodes, he asks to give a directory name and dumps the inodes into the directory. Finally he asks you if you want to filter the inodes again (in case you typed some wrong answers).
We hope you will never need recover, but in case, its better to install this program anyway. Once a file is deleted, everytime something is written to disk, theres a change it will overwrite the old deleted file. You will never be able to restore it.
Download (0.018MB)
Added: 2005-04-04 License: GPL (GNU General Public License) Price:
4099 downloads
recoverdm 0.19
recoverdm is a software that can recover files/disks with damaged sectors more>>
recoverdm is a software that can recover files/disks with damaged sectors
This program will help you recover disks with bad sectors. You can recover files as well complete devices.
In case if finds sectors which simply cannot be recoverd, it writes an empty sector to the outputfile and continues. If youre recovering a CD or a DVD and the program cannot read the sector in "normal mode", then the program will try to read the sector in "RAW mode" (without error-checking etc.).
This toolkit also has a utility called mergebad: mergebad merges multiple images into one. This can be usefull when you have, for example, multiple CDs with the same data which are all damaged.
In such case, you can then first use recoverdm to retrieve the data from the damaged CDs into image-files and then combine them into one image with mergebad.
Usage:
recoverdm -t type -i file/devicein -o fileout [-l list] [-n retries] [-s speed]
-t type is 1 for files, 10 for floppy disks and 40 for IDE disks (try -h for a complete list)
-i file/devicein is the device or file you want to recover
-o fileout is the file where to write to. this file should not already exist!
-l list this file will contain the offsets(!) of the bad blocks as well as the size of the badblock. This file can be used together with the image with the mergebad utility.
-n retries number of retries before going on with next sector, defaults to 6
-r RAW read retries number of retries while reading in RAW mode before going on with next sector, defaults to 6
-s rotation speed rotation speed of CD-ROM/DVD, defaults to 1
-h gives the helptext
Enhancements:
- This release adds the ability to set the start-offset to read from the damaged media, a small performance optimization, and a fix for an infinite loop.
<<lessThis program will help you recover disks with bad sectors. You can recover files as well complete devices.
In case if finds sectors which simply cannot be recoverd, it writes an empty sector to the outputfile and continues. If youre recovering a CD or a DVD and the program cannot read the sector in "normal mode", then the program will try to read the sector in "RAW mode" (without error-checking etc.).
This toolkit also has a utility called mergebad: mergebad merges multiple images into one. This can be usefull when you have, for example, multiple CDs with the same data which are all damaged.
In such case, you can then first use recoverdm to retrieve the data from the damaged CDs into image-files and then combine them into one image with mergebad.
Usage:
recoverdm -t type -i file/devicein -o fileout [-l list] [-n retries] [-s speed]
-t type is 1 for files, 10 for floppy disks and 40 for IDE disks (try -h for a complete list)
-i file/devicein is the device or file you want to recover
-o fileout is the file where to write to. this file should not already exist!
-l list this file will contain the offsets(!) of the bad blocks as well as the size of the badblock. This file can be used together with the image with the mergebad utility.
-n retries number of retries before going on with next sector, defaults to 6
-r RAW read retries number of retries while reading in RAW mode before going on with next sector, defaults to 6
-s rotation speed rotation speed of CD-ROM/DVD, defaults to 1
-h gives the helptext
Enhancements:
- This release adds the ability to set the start-offset to read from the damaged media, a small performance optimization, and a fix for an infinite loop.
Download (0.009MB)
Added: 2005-12-05 License: GPL (GNU General Public License) Price:
1422 downloads
Relax and Recover 1.2
Relax and Recover (abbreviated rear) is a highly modular disaster recovery framework for GNU/Linux based systems. more>>
Relax and Recover (abbreviated rear) is a highly modular disaster recovery framework for GNU/Linux based systems.
The disaster recovery information (and maybe the backups) can be stored via the network, local on hard disks or USB devices, DVD/CD-R, tape, etc. The result is also a bootable image that is capable of booting via PXE, DVD/CD and tape (OBDR).
Main features:
- Focus on Disaster Recovery
- Modular concept
- For Linux and other Unix-like operations systems
- No external dependancies - use only standard software supplied with the distribution
- encryption (optional) - openssl ?
- Linux: kernel > 2.6 supported (no kernel 2.2/2.4 support !)
- User friendly - minimal output, use log file for error messages and details
The aim is to make rear as least demanding as possible, it will require only the applications neccessary to fulfill the job rear is configured for. All other applications will be copied to the rescue system if they are present.
Enhancements:
- Added SELinux suppport for NETFS Did restore tests with NETFS - see video 2006-08-31 GSS
- Added NETFS support BACKUP=NETFS 2006-08-30 GSS
- finally fixed bug in mkrescue-functions.sh about c0d0p 0 (DEVwP=1)
- Added RHEL ES/AS support 2006-07-21 GD
- start the NFS/CIFS tar backup-restore cyclus
- added support for Software RAID
<<lessThe disaster recovery information (and maybe the backups) can be stored via the network, local on hard disks or USB devices, DVD/CD-R, tape, etc. The result is also a bootable image that is capable of booting via PXE, DVD/CD and tape (OBDR).
Main features:
- Focus on Disaster Recovery
- Modular concept
- For Linux and other Unix-like operations systems
- No external dependancies - use only standard software supplied with the distribution
- encryption (optional) - openssl ?
- Linux: kernel > 2.6 supported (no kernel 2.2/2.4 support !)
- User friendly - minimal output, use log file for error messages and details
The aim is to make rear as least demanding as possible, it will require only the applications neccessary to fulfill the job rear is configured for. All other applications will be copied to the rescue system if they are present.
Enhancements:
- Added SELinux suppport for NETFS Did restore tests with NETFS - see video 2006-08-31 GSS
- Added NETFS support BACKUP=NETFS 2006-08-30 GSS
- finally fixed bug in mkrescue-functions.sh about c0d0p 0 (DEVwP=1)
- Added RHEL ES/AS support 2006-07-21 GD
- start the NFS/CIFS tar backup-restore cyclus
- added support for Software RAID
Download (0.099MB)
Added: 2006-09-04 License: GPL (GNU General Public License) Price:
1150 downloads
recoverPhotos 0.5
recoverPhotos is a program that recovers digital images from camera memory cards that have been formatted or damaged. more>>
recoverPhotos is a program that recovers digital images from camera memory cards that have been formatted or damaged.
This program relies on the fact that most photos are composed of contiguous sectors. If you tend to delete a lot of photos before a format, then you might not have very good success. But if you are like me: who reformats every time) then you fill get most of your pictures back.
This program has only been tested with a 20d. Any success stories are welcome.
HOW TO USE
To run this program I recommend you first copy the contents of the card to a file in your machine. The easiest way is to use the dd command.
Instructions:
- Connect the camera or the flashcard to the computer.
- Check what is the mount point for your camera or the flashcard. You can use the mount command for this. For example in my computer the flashcard is mounted as device /dev/sdc1
dmg@platinum recoverPhotos]$ mount
[...]
/dev/sdc1 on /media/EOS_DIGITAL type vfat ...
[...]
Now, use dd to copy the flashcard to a file. For example, this command copies the contents of my memory card to a file called /tmp/card.bytes (You might need to run this command as root).
dd if=/dev/sdc1 of=/tmp/card.bytes
Make sure the device name (in this case /dev/sdc1) is correct!
The resulting file should have the same size as the flashcard.
./recoverPhotos /tmp/card.bytes
and check the output. Hopefully you will have a bunch of photos in the current directory. Run the program without parameters to see all the options available.
CANON USERS
If you use a camera that uses the custom function "Add Decision Data" (CF18 in the D20), and you are 100% sure it was on when you took the photos, then make sure you specify the --canonADD option. The option is not critical (it is not part of the photo), but the data is there if you want to recover it.
Enhancements:
- JPEG and Canon CR2 files are supported.
<<lessThis program relies on the fact that most photos are composed of contiguous sectors. If you tend to delete a lot of photos before a format, then you might not have very good success. But if you are like me: who reformats every time) then you fill get most of your pictures back.
This program has only been tested with a 20d. Any success stories are welcome.
HOW TO USE
To run this program I recommend you first copy the contents of the card to a file in your machine. The easiest way is to use the dd command.
Instructions:
- Connect the camera or the flashcard to the computer.
- Check what is the mount point for your camera or the flashcard. You can use the mount command for this. For example in my computer the flashcard is mounted as device /dev/sdc1
dmg@platinum recoverPhotos]$ mount
[...]
/dev/sdc1 on /media/EOS_DIGITAL type vfat ...
[...]
Now, use dd to copy the flashcard to a file. For example, this command copies the contents of my memory card to a file called /tmp/card.bytes (You might need to run this command as root).
dd if=/dev/sdc1 of=/tmp/card.bytes
Make sure the device name (in this case /dev/sdc1) is correct!
The resulting file should have the same size as the flashcard.
./recoverPhotos /tmp/card.bytes
and check the output. Hopefully you will have a bunch of photos in the current directory. Run the program without parameters to see all the options available.
CANON USERS
If you use a camera that uses the custom function "Add Decision Data" (CF18 in the D20), and you are 100% sure it was on when you took the photos, then make sure you specify the --canonADD option. The option is not critical (it is not part of the photo), but the data is there if you want to recover it.
Enhancements:
- JPEG and Canon CR2 files are supported.
Download (0.071MB)
Added: 2005-09-02 License: GPL (GNU General Public License) Price:
1512 downloads
gzip Recovery Toolkit 0.5
gzip Recovery Toolkit attempts to automate the recovery of data from corrupted gzip files (including tarballs) through a program more>>
The gzip Recovery Toolkit attempts to automate the recovery of data from corrupted gzip files (including tarballs) through a program called gzrecover. gzip Recovery Toolkit package is still very experimental at this point.
99% of "corrupted" gzip archives are caused by transferring the file via FTP in ASCII mode instead of binary mode. Please re-transfer the file in the correct mode first before attempting to recover from a file you believe is corrupted.
This program is provided AS IS with absolutely NO WARRANTY. It is not guaranteed to recover anything from your file, nor is what it does recover guaranteed to be good data. The bigger your file, the more likely that something will be extracted from it. Also keep in mind that this program gets faked out and is likely to "recover" some bad data. Everything should be manually verified.
Usage:
Run gzrecover on a corrupted .gz file. Anything that can be read from the file will be written to a file with the same name, but with a .recovered appended (any .gz is stripped). You can override this with the -o option.
To get a verbose readout of exactly where gzrecover is finding bad bytes, use the -v option to enable verbose mode. This will probably overflow your screen with text so best to redirect output to a file.
Once gzrecover has finished, you will need to manually verify any data recovered as it is quite likely that our output file is corrupt and has some garbage data in it. If your archive is a tarball, read on.
For tarballs, the tar program will choke because GNU tar cannot handle errors in the file format. Fortunately, GNU cpio (tested at version 2.5 or higher) handles corrupted files out of the box.
Heres an example:
$ ls *.gz
my-corrupted-backup.tar.gz
$ gzrecover my-corrupted-backup.tar.gz
$ ls *.recovered
my-corrupted-backup.tar.recovered
$ cpio -F my-corrupted-backup.tar.recovered -i -v
If you have a previous release, please note that the patches to GNU tar have been discontinued. They were only marginally successful at best and GNU cpio does what is needed out of the box and does it far better.
Enhancements:
- Documentation updates, including a man page, plus code cleanup to better enable inclusion in GNU/Linux packages and eliminate compilation warnings.
<<less99% of "corrupted" gzip archives are caused by transferring the file via FTP in ASCII mode instead of binary mode. Please re-transfer the file in the correct mode first before attempting to recover from a file you believe is corrupted.
This program is provided AS IS with absolutely NO WARRANTY. It is not guaranteed to recover anything from your file, nor is what it does recover guaranteed to be good data. The bigger your file, the more likely that something will be extracted from it. Also keep in mind that this program gets faked out and is likely to "recover" some bad data. Everything should be manually verified.
Usage:
Run gzrecover on a corrupted .gz file. Anything that can be read from the file will be written to a file with the same name, but with a .recovered appended (any .gz is stripped). You can override this with the -o option.
To get a verbose readout of exactly where gzrecover is finding bad bytes, use the -v option to enable verbose mode. This will probably overflow your screen with text so best to redirect output to a file.
Once gzrecover has finished, you will need to manually verify any data recovered as it is quite likely that our output file is corrupt and has some garbage data in it. If your archive is a tarball, read on.
For tarballs, the tar program will choke because GNU tar cannot handle errors in the file format. Fortunately, GNU cpio (tested at version 2.5 or higher) handles corrupted files out of the box.
Heres an example:
$ ls *.gz
my-corrupted-backup.tar.gz
$ gzrecover my-corrupted-backup.tar.gz
$ ls *.recovered
my-corrupted-backup.tar.recovered
$ cpio -F my-corrupted-backup.tar.recovered -i -v
If you have a previous release, please note that the patches to GNU tar have been discontinued. They were only marginally successful at best and GNU cpio does what is needed out of the box and does it far better.
Enhancements:
- Documentation updates, including a man page, plus code cleanup to better enable inclusion in GNU/Linux packages and eliminate compilation warnings.
Download (0.005MB)
Added: 2006-08-29 License: zlib/libpng License Price:
1170 downloads
Photorec 6.6
PhotoRec is a small tool to recover pictures from digital camera memory. more>>
PhotoRec is a small tool to recover pictures from digital camera memory. Photorec software searches for MOV and JPEG headers, and because there is (usually) no data fragmentation, it can recover the whole file.
It can recover data from CompactFlash, Memory Stick, SecureDigital, SmartMedia, Microdrive, MMC, USB Memory Drives...
PhotoRec is safe to use, it will never attempt to write to the drive or memory support you are about to recover from. Recovered files are instead written in the directory from where you are running the PhotoRec program.
Photorec ignores the filesystem, this way it works even if the filesystem is severely damaged.
It can recover lost files at least from:
- FAT,
- NTFS,
- EXT2/EXT3 filesystem
Digital Camera
PhotoRec has been successfully tested with:
- Canon EOS300D, 10D
- HP PhotoSmart 620, 850, 935
- Nikon CoolPix 775, 5700
- Olympus C350N, C860L, Mju 400 Digital, Stylus 300
- Sony DSC-P9
- Praktica DCZ-3.4
- Casio Exilim EX-Z 750
PhotoRec searchs known file header and because there is no data fragmentation (usually), it can recover the whole file. Photorec recognises numerous file format including:
Archive
- .7z 7zip archive file
- .bz2 bzip2 compressed data
- .gz gzip compressed data
- .rar Rar archive
- .tar tar archive
- .zip zip archive
- Multimedia
- .asf, .wma, .wmv: Advanced Streaming Format used for Audio/Video
- .au Sun/NeXT audio data
- .avi .wav RIFF audio/video
- .bmp BMP bitmap image
- .cdr Corel Draw
- .crw Canon Raw picture
- .ctg Canon catalog
- .dcr Kodak Raw picture
- .dsc Nikon dsc
- .fla Flash Project File
- .gif Graphic Interchange Format
- .jng JPEG Network Graphics
- .jpg JPG picture
- .mng Multiple-Image Network Graphics
- .mov MOV video
- .mp3 MPEG ADTS, layer III, v1 audio
- .mp4 MPEG 4
- .mpg Moving Picture Experts Group video
- .mrw Minolta Raw picture
- .ogg OGG Vorbis audio
- .orf Olympus Raw Format picture
- .pcx PCX file format
- .pef Pentax Raw picture
- .png Portable Network Graphics
- .psd Adobe Photoshop Image
- .qxd QuarkXpress Document
- .qxp QuarkXpress Document
- .raf Raw Fujifilm picture
- .raw Contax picture
- .rdc Rollei picture
- .sit Mikron
- .sr2 Sony Raw picture
- .tif Tag Image File Format
- .x3f Sigma/Foveon X3 raw picture
- .xcf GIMP XCF File
Office
- .doc Microsoft Word
- .mbd Access database
- .odd OpenDocument Drawing
- .odp OpenDocument Presentation
- .ods OpenDocument Spreadsheet
- .odt OpenDocument Text
- .pap Papyrus word file
- .ppt PowerPoint presentation
- .rtf Rich Text Format
- .sda StarDraw
- .sdc StarCalc
- .sdd StarImpress
- .sdw StarWriter
- .slk Sylk, Multiplan Symbolic Link Interchange
- .sxc OpenOffice Spreadsheet
- .sxd OpenOffice Drawing
- .sxi OpenOffice Presentation
- .sxw OpenOffice Text Document
- .txt Text file
- .vis Visio document
- .xls Microsoft Excel
Others
- .asp ASP script
- .bat Batch
- .c C source file
- .dbf DBase 3 (prone to false positive)
- .dbx Outlook Express
- .eps Encasulated PostScript
- .exe MS executable
- .frm MySQL table definition
- .h C header
- .html HTML
- .jsp JSP script
- .MYI MySQL MISAM compressed data
- .pdf Portable Document Format
- .php PHP script
- .pl Perl script
- .prc PalmOS application
- .ps PostScript document
- .pst Outlook
- .py Python script
- .qdf Quicken
- .sh Shell script
- .wab Windows Address Book
Enhancements:
- A new method for handling fragmented data is now used, making recovery more reliable and faster.
- This release can be set to search for files in FAT16/FAT32 unallocated space only, which avoids wasting time recovering files that are still accessible, making the recovery of lost files much faster and more efficient.
- New file formats have been added.
<<lessIt can recover data from CompactFlash, Memory Stick, SecureDigital, SmartMedia, Microdrive, MMC, USB Memory Drives...
PhotoRec is safe to use, it will never attempt to write to the drive or memory support you are about to recover from. Recovered files are instead written in the directory from where you are running the PhotoRec program.
Photorec ignores the filesystem, this way it works even if the filesystem is severely damaged.
It can recover lost files at least from:
- FAT,
- NTFS,
- EXT2/EXT3 filesystem
Digital Camera
PhotoRec has been successfully tested with:
- Canon EOS300D, 10D
- HP PhotoSmart 620, 850, 935
- Nikon CoolPix 775, 5700
- Olympus C350N, C860L, Mju 400 Digital, Stylus 300
- Sony DSC-P9
- Praktica DCZ-3.4
- Casio Exilim EX-Z 750
PhotoRec searchs known file header and because there is no data fragmentation (usually), it can recover the whole file. Photorec recognises numerous file format including:
Archive
- .7z 7zip archive file
- .bz2 bzip2 compressed data
- .gz gzip compressed data
- .rar Rar archive
- .tar tar archive
- .zip zip archive
- Multimedia
- .asf, .wma, .wmv: Advanced Streaming Format used for Audio/Video
- .au Sun/NeXT audio data
- .avi .wav RIFF audio/video
- .bmp BMP bitmap image
- .cdr Corel Draw
- .crw Canon Raw picture
- .ctg Canon catalog
- .dcr Kodak Raw picture
- .dsc Nikon dsc
- .fla Flash Project File
- .gif Graphic Interchange Format
- .jng JPEG Network Graphics
- .jpg JPG picture
- .mng Multiple-Image Network Graphics
- .mov MOV video
- .mp3 MPEG ADTS, layer III, v1 audio
- .mp4 MPEG 4
- .mpg Moving Picture Experts Group video
- .mrw Minolta Raw picture
- .ogg OGG Vorbis audio
- .orf Olympus Raw Format picture
- .pcx PCX file format
- .pef Pentax Raw picture
- .png Portable Network Graphics
- .psd Adobe Photoshop Image
- .qxd QuarkXpress Document
- .qxp QuarkXpress Document
- .raf Raw Fujifilm picture
- .raw Contax picture
- .rdc Rollei picture
- .sit Mikron
- .sr2 Sony Raw picture
- .tif Tag Image File Format
- .x3f Sigma/Foveon X3 raw picture
- .xcf GIMP XCF File
Office
- .doc Microsoft Word
- .mbd Access database
- .odd OpenDocument Drawing
- .odp OpenDocument Presentation
- .ods OpenDocument Spreadsheet
- .odt OpenDocument Text
- .pap Papyrus word file
- .ppt PowerPoint presentation
- .rtf Rich Text Format
- .sda StarDraw
- .sdc StarCalc
- .sdd StarImpress
- .sdw StarWriter
- .slk Sylk, Multiplan Symbolic Link Interchange
- .sxc OpenOffice Spreadsheet
- .sxd OpenOffice Drawing
- .sxi OpenOffice Presentation
- .sxw OpenOffice Text Document
- .txt Text file
- .vis Visio document
- .xls Microsoft Excel
Others
- .asp ASP script
- .bat Batch
- .c C source file
- .dbf DBase 3 (prone to false positive)
- .dbx Outlook Express
- .eps Encasulated PostScript
- .exe MS executable
- .frm MySQL table definition
- .h C header
- .html HTML
- .jsp JSP script
- .MYI MySQL MISAM compressed data
- .pdf Portable Document Format
- .php PHP script
- .pl Perl script
- .prc PalmOS application
- .ps PostScript document
- .pst Outlook
- .py Python script
- .qdf Quicken
- .sh Shell script
- .wab Windows Address Book
Enhancements:
- A new method for handling fragmented data is now used, making recovery more reliable and faster.
- This release can be set to search for files in FAT16/FAT32 unallocated space only, which avoids wasting time recovering files that are still accessible, making the recovery of lost files much faster and more efficient.
- New file formats have been added.
Download (1.0MB)
Added: 2007-05-09 License: GPL (GNU General Public License) Price:
934 downloads
twocrypt 2
twocrypt provides a crypto tool with a deniable encryption option. more>>
twocrypt provides a crypto tool with a deniable encryption option.
twocrypt (2c) is a tool for the ultra-paranoid, providing a traditional crypto, but also an option of deniable (subpoena-proof) encryption. It encrypts one or two files at once.
Each file can be recovered with its respective passphrase, but the presence of more than one file cannot be demonstrated, and the presence of this option alone should not be a credible argument for data hiding.
2c2 is a simple symmetric file encryption utility. It comes with an
interesting optional feature - it is capable to embed an additional file
within an encrypted data. This is done in a way that cannot be detected
without knowing the passphrase protecting the "hidden" file, even if the
password for the primary file is disclosed. The design is such that the
fact of using this method alone does not constitute a credible evidence of
data hiding (IANALBMSUTDO). This kind of encryption is also called
"subpoena-proof" or "deniable".
There is some previous work in this area. There are two popular approaches,
one is to throw away the encryption key, but store some information that
can be used to recover the key with a considerable computation effort
(several years or so). The concept seems to be risky for obvious reasons,
and is also impractical if the data has to remain accessible before the
projected cracking date.
The other approach is to have a number of containers protected with a number of passwords, of which some but not all might be encrypted data (rubberhose does that). I think its needlessly complex, and usually applied to a storage such as a disk drive.
As such, 2c would be the first tool to implement this functionality in a
reasonable and practical fasion, at least I think so.
Enhancements:
- It was possible to tell a two-file result from a single-file output,
_statistically_. This does not mean the question can be answered for a
particular archive, but single-file archives had a tendency to result
in a slightly larger file, and if you have a number of 2c-protected
files for which the primary password has been obtained, it can be
told how you use 2c. The reason for that was slightly broken compressed
pad length logic.
Severity: medium
- As a cryptographic safeguard, the random pad stream now consists of
a random, compressed file of a random length, followed by true garbage.
This is to mimick second file scenario more closely, so that if the
encryption proves weaker than originally thought, and some statistical
properties of a stream can be deduced, theres no exposure. Version
1 always used a full-length compressed pad, which was silly in that
its not that common to store perfectly-fit secondary files.
Severity: hypotetical issue
- In v1, random chunk would seldom get compressed, because the compression
algorithm resorted to storing uncompressed data if compression would
result in output bigger than input. This is not a flaw per se, but
defeats a minor safeguard intended to mimick a file that would often
be compressible. Now, encryption of all blocks is forced, even though
it might be less efficient.
Severity: hypotetical issue
- Input blocks are now split randomly to avoid placing compression
headers and other known structures at constant locations. This is just
another arbitrary safeguard for the algorithm.
Severity: hypotetical issue
- per Jamess suggestion, I added a counter to the PRNG generator
internal state. This prevents a hypotetical (although *extremely*
unlikely) generator stall scenario. This spectacularly breaks v1
compatibility, blame James ;-)
Severity: low
<<lesstwocrypt (2c) is a tool for the ultra-paranoid, providing a traditional crypto, but also an option of deniable (subpoena-proof) encryption. It encrypts one or two files at once.
Each file can be recovered with its respective passphrase, but the presence of more than one file cannot be demonstrated, and the presence of this option alone should not be a credible argument for data hiding.
2c2 is a simple symmetric file encryption utility. It comes with an
interesting optional feature - it is capable to embed an additional file
within an encrypted data. This is done in a way that cannot be detected
without knowing the passphrase protecting the "hidden" file, even if the
password for the primary file is disclosed. The design is such that the
fact of using this method alone does not constitute a credible evidence of
data hiding (IANALBMSUTDO). This kind of encryption is also called
"subpoena-proof" or "deniable".
There is some previous work in this area. There are two popular approaches,
one is to throw away the encryption key, but store some information that
can be used to recover the key with a considerable computation effort
(several years or so). The concept seems to be risky for obvious reasons,
and is also impractical if the data has to remain accessible before the
projected cracking date.
The other approach is to have a number of containers protected with a number of passwords, of which some but not all might be encrypted data (rubberhose does that). I think its needlessly complex, and usually applied to a storage such as a disk drive.
As such, 2c would be the first tool to implement this functionality in a
reasonable and practical fasion, at least I think so.
Enhancements:
- It was possible to tell a two-file result from a single-file output,
_statistically_. This does not mean the question can be answered for a
particular archive, but single-file archives had a tendency to result
in a slightly larger file, and if you have a number of 2c-protected
files for which the primary password has been obtained, it can be
told how you use 2c. The reason for that was slightly broken compressed
pad length logic.
Severity: medium
- As a cryptographic safeguard, the random pad stream now consists of
a random, compressed file of a random length, followed by true garbage.
This is to mimick second file scenario more closely, so that if the
encryption proves weaker than originally thought, and some statistical
properties of a stream can be deduced, theres no exposure. Version
1 always used a full-length compressed pad, which was silly in that
its not that common to store perfectly-fit secondary files.
Severity: hypotetical issue
- In v1, random chunk would seldom get compressed, because the compression
algorithm resorted to storing uncompressed data if compression would
result in output bigger than input. This is not a flaw per se, but
defeats a minor safeguard intended to mimick a file that would often
be compressible. Now, encryption of all blocks is forced, even though
it might be less efficient.
Severity: hypotetical issue
- Input blocks are now split randomly to avoid placing compression
headers and other known structures at constant locations. This is just
another arbitrary safeguard for the algorithm.
Severity: hypotetical issue
- per Jamess suggestion, I added a counter to the PRNG generator
internal state. This prevents a hypotetical (although *extremely*
unlikely) generator stall scenario. This spectacularly breaks v1
compatibility, blame James ;-)
Severity: low
Download (0.013MB)
Added: 2007-02-28 License: GPL (GNU General Public License) Price:
969 downloads
Local IP Takeover 1.2
Local IP Takeover provides network link redundancy within a single server that has multiple network interface cards. more>>
Local IP Takeover provides network link redundancy within a single server that has multiple network interface cards (NICs) with each NIC connected to separate network switches.
If the primary NIC fails (i.e. it cannot ping its default gateway), the "service" IP (the IP that the outside world connects to) will automatically float to the secondary NIC and a specially crafted ARP (utilizing send_arp) will be broadcast on the local network, thereby instructing all other hosts to update their local ARP cache.
The result is minimal service downtime. Plus, no manual intervention is required in the event that a network card, cable, or switch breaks.
Enhancements:
- The initialization step is more robust and it doesnt allow lipt to abort its execution. Instead, lipt should recover to a sane state eventually (within less than half a minute under normal circumstances).
- Other minor fixes were made.
<<lessIf the primary NIC fails (i.e. it cannot ping its default gateway), the "service" IP (the IP that the outside world connects to) will automatically float to the secondary NIC and a specially crafted ARP (utilizing send_arp) will be broadcast on the local network, thereby instructing all other hosts to update their local ARP cache.
The result is minimal service downtime. Plus, no manual intervention is required in the event that a network card, cable, or switch breaks.
Enhancements:
- The initialization step is more robust and it doesnt allow lipt to abort its execution. Instead, lipt should recover to a sane state eventually (within less than half a minute under normal circumstances).
- Other minor fixes were made.
Download (0.011MB)
Added: 2007-05-16 License: GPL (GNU General Public License) Price:
892 downloads
Kmail password decrypter
Kmail password decrypter can recover you Kmail password if you lost it. more>>
Kmail password decrypter can recover you Kmail password if you lost it.
Lost your KMail password? Use this tool that I whipped up in a jiffy.
<<lessLost your KMail password? Use this tool that I whipped up in a jiffy.
Download (0.003MB)
Added: 2006-07-19 License: GPL (GNU General Public License) Price:
1215 downloads
glastree 1.04
glastree builds live backup trees. more>>
glastree application builds live backup trees, with branches for each day. Users directly browse the past to recover older documents or retrieve lost files. Hard links serve to compress out unchanged files, while modified ones are copied verbatim. A prune utility effects a constant, sliding window.
<<less Download (0.006MB)
Added: 2007-06-11 License: Public Domain Price:
865 downloads
triggers 0.41
trigger is a lightweight, asynchronous notification mechanism to set off events in and across systems. more>>
trigger is a lightweight, asynchronous notification mechanism to set off events in and across systems. The poor mans daily snapshot, glastree builds live backup trees, with branches for each day. Users directly browse the past to recover older documents or retrieve lost files. Hard links serve to compress out unchanged files, while modified ones are copied verbatim. A prune utility effects a constant, sliding window.
<<less Download (0.014MB)
Added: 2006-07-13 License: GPL (GNU General Public License) Price:
1198 downloads
myrescue 0.9.3
myrescue is a program to rescue the still-readable data from a damaged harddisk. more>>
myrescue is a program to rescue the still-readable data from a damaged harddisk. The project is similiar in purpose to dd_rescue, but it tries to quickly get out of damaged areas to first handle the not yet damaged part of the disk and return later.
Note:
This tools is no replacement for a professional data recovery service! If you do have the latter option, dont even think of using myrescue, as it may further damage your disk. This tool is provided only for the case that you are absolutely desperate and definitely cannot afford a professional data recovery. Or in case you know what you are doing, e.g. if you know that it is the aging of the magnetisation layer that is causing your problem.
The usual GPL disclaimer applies. Especially the NON-WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. Dont blame (or sue) me if it fails to recover or further damages your data.
How it works
The program tries to copy the device blockwise to a file and keeps a table ("block bitmap") noting whether a block has been successfully copied, not yet handled or has had errors. This block bitmap can be used in successive runs to concentrate on the not yet rescued blocks.
The program has a special skip mode to handle read errors. Usually harddisk surface defects cover more than just one block and continuous reading in defect areas can damage the surface, the heads and (by permanent recalibration) the drive mechanics. If this happens, the chances of rescuing the remaining undamaged data drop dramatically. So in skip mode, myrescue tries to get out of damaged areas quickly by exponentially increasing the stepsize. The skipped blocks are marked as unhandled in the block bitmap and can be retried later.
Finally, the program has an option to multiply try to read a block before considering it damaged.
<<lessNote:
This tools is no replacement for a professional data recovery service! If you do have the latter option, dont even think of using myrescue, as it may further damage your disk. This tool is provided only for the case that you are absolutely desperate and definitely cannot afford a professional data recovery. Or in case you know what you are doing, e.g. if you know that it is the aging of the magnetisation layer that is causing your problem.
The usual GPL disclaimer applies. Especially the NON-WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. Dont blame (or sue) me if it fails to recover or further damages your data.
How it works
The program tries to copy the device blockwise to a file and keeps a table ("block bitmap") noting whether a block has been successfully copied, not yet handled or has had errors. This block bitmap can be used in successive runs to concentrate on the not yet rescued blocks.
The program has a special skip mode to handle read errors. Usually harddisk surface defects cover more than just one block and continuous reading in defect areas can damage the surface, the heads and (by permanent recalibration) the drive mechanics. If this happens, the chances of rescuing the remaining undamaged data drop dramatically. So in skip mode, myrescue tries to get out of damaged areas quickly by exponentially increasing the stepsize. The skipped blocks are marked as unhandled in the block bitmap and can be retried later.
Finally, the program has an option to multiply try to read a block before considering it damaged.
Download (0.014MB)
Added: 2006-11-22 License: GPL (GNU General Public License) Price:
1068 downloads
Zmanda Recovery Manager for MySQL 1.2.1
Zmanda Recovery Manager for MySQL simplifies life of a database administrator who needs an easy to use backup solution. more>>
Zmanda Recovery Manager for MySQL simplifies life of a database administrator who needs an easy to use yet flexible and robust backup and recovery solution for MySQL server. With ZRM for MySQL you can:
- Schedule full and incremental logical or raw backups of your MySQL database
- Perform backup that is the best match for your storage engine and your MySQL configuration
- Get e-mail notification about status of your backups
- Monitor and browse your backups
- Recover database easily to any point in time or to any particular transaction
<<less- Schedule full and incremental logical or raw backups of your MySQL database
- Perform backup that is the best match for your storage engine and your MySQL configuration
- Get e-mail notification about status of your backups
- Monitor and browse your backups
- Recover database easily to any point in time or to any particular transaction
Download (0.10MB)
Added: 2007-08-02 License: GPL (GNU General Public License) Price:
813 downloads
The Revisionist 0.02b
The Revisionist is a tool for extracting and indexing hidden metadata. more>>
The Revisionist is a tool for extracting and indexing hidden metadata (such as deleted or modified text) from large collections of MS Word files.
It can operate whole Web sites or SMB or NFS directories. The Revisionist project is handy for pen-testing, or it can be used just to spot embarrassing secrets.
My primary goal is to provide pen-testers and content administrators with a handy tool to detect hidden data in all documents available at a specific location (be it a locally mounted network share, a HTTP site, or whatnot), and easily review it all.
Right now, the tool only detects and indexes deleted text in documents with "change tracking" enabled, and can also index usernames and hardware addresses embedded in documents (to facilitate external assessment of company structure); future versions should be able to recover other goodies, too.
Usage:
To run the tool against a local directory, a mounted SMB or NFS directory, or such, simply issue the following command (after doing make, that is):
./therev @/path/to/directory
After the tool completes, you should be able to view master.html in current directory using your favourite browser (Lynx, Netscape, etc). Cached copies of documents would be placed in subdirectories named document.XXXXXX, where X is a random digit; hence, it is recommended to run the tool in a separate directory.
Note that you may also instruct the tool to look for specific substring and only choose those documents that contain it (strict checking, no regexp available):
./therev linux @/path/to/directory
To run the program against a specific site or top-level domain, do the following:
./therev site.com
Note that com, gov, gov.pl, www.microsoft.com are all a valid site name. The first parameter works similar to the previous case:
./therev homeland security gov
As a special bonus, when running the script against multilinguinal sites, you might want to specify a third parameter - desired language (using a two-letter code: en, pl, etc). NOTE: DO NOT USE LANGUAGE QUALIFIER UNLESS NECESSARY:
./therev linux microsoft.com en
The HTTP search mode uses Google.com to locate all matching Word documents on a specific site. For a document to be found, it must be indexable (that is, not excluded in robots.txt) and be in the first 1000 of results for a specific site. If there are more than 1000 documents at some website, consider sub-searches with keywords.
Enhancements:
- This release was fixed to work with the new Google page layout.
- Some other minor fixes were made.
<<lessIt can operate whole Web sites or SMB or NFS directories. The Revisionist project is handy for pen-testing, or it can be used just to spot embarrassing secrets.
My primary goal is to provide pen-testers and content administrators with a handy tool to detect hidden data in all documents available at a specific location (be it a locally mounted network share, a HTTP site, or whatnot), and easily review it all.
Right now, the tool only detects and indexes deleted text in documents with "change tracking" enabled, and can also index usernames and hardware addresses embedded in documents (to facilitate external assessment of company structure); future versions should be able to recover other goodies, too.
Usage:
To run the tool against a local directory, a mounted SMB or NFS directory, or such, simply issue the following command (after doing make, that is):
./therev @/path/to/directory
After the tool completes, you should be able to view master.html in current directory using your favourite browser (Lynx, Netscape, etc). Cached copies of documents would be placed in subdirectories named document.XXXXXX, where X is a random digit; hence, it is recommended to run the tool in a separate directory.
Note that you may also instruct the tool to look for specific substring and only choose those documents that contain it (strict checking, no regexp available):
./therev linux @/path/to/directory
To run the program against a specific site or top-level domain, do the following:
./therev site.com
Note that com, gov, gov.pl, www.microsoft.com are all a valid site name. The first parameter works similar to the previous case:
./therev homeland security gov
As a special bonus, when running the script against multilinguinal sites, you might want to specify a third parameter - desired language (using a two-letter code: en, pl, etc). NOTE: DO NOT USE LANGUAGE QUALIFIER UNLESS NECESSARY:
./therev linux microsoft.com en
The HTTP search mode uses Google.com to locate all matching Word documents on a specific site. For a document to be found, it must be indexable (that is, not excluded in robots.txt) and be in the first 1000 of results for a specific site. If there are more than 1000 documents at some website, consider sub-searches with keywords.
Enhancements:
- This release was fixed to work with the new Google page layout.
- Some other minor fixes were made.
Download (0.016MB)
Added: 2006-01-30 License: LGPL (GNU Lesser General Public License) Price:
1363 downloads
ADS Dexter 0.40
ADS Dexter is a utility for extracting data from scanned graphs. more>>
The following is an excerpt from a poster presented at the American Astronomical Societys 2000 Summer meeting in Rochester, NY.
ADS roughly 1,000,000 scanned pages contain numerous diagrams and figures for which the original data sets are lost or inaccessible. Having scans for the figures invites digitizing the data points to recover at least a part of these data.
Performing this digitization automatically is still beyond the capabilities of current OCR systems, but the computer can ease this process for a human.
This was the starting point for Dexter, a Java applet that runs in the users browsers and provides an interface for selecting the part of the page that is of interest. On that selection, coordinate axes, points and error bars can be marked and, of course, corrected. [...]
In the future, we plan to implement some recognition algorithms that would, e.g., trace a line for the user or automatically search for markers.
<<lessADS roughly 1,000,000 scanned pages contain numerous diagrams and figures for which the original data sets are lost or inaccessible. Having scans for the figures invites digitizing the data points to recover at least a part of these data.
Performing this digitization automatically is still beyond the capabilities of current OCR systems, but the computer can ease this process for a human.
This was the starting point for Dexter, a Java applet that runs in the users browsers and provides an interface for selecting the part of the page that is of interest. On that selection, coordinate axes, points and error bars can be marked and, of course, corrected. [...]
In the future, we plan to implement some recognition algorithms that would, e.g., trace a line for the user or automatically search for markers.
Download (0.079MB)
Added: 2005-05-20 License: GPL (GNU General Public License) Price:
1620 downloads
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