Free encryption program in c software for linux

Eureka Encryption Global Edition contains file encryption, multiple encryption, merge encryption, multiple file encryption, embedded applications (Crypt Words, Steganographer, Interface) and other tools such as a file shredder and scrambler.

Eureka Encryption Global Edition is available for Windows, Mac and Linux. Other applications are available from the website.

Eureka Messenger 4 software delivers secure and private messaging and unlimited file transfers over the internet.

This application no longer requires the VB Runtimes, but this new version 4 is not compatible with the previous windows version.

Installation:

Actually there is no install for this application. You can run it right where you unzipped it, or copy the files unzipped wherever you want them.

If there is a firewall on either machine, some configuration may be required in order to make a connection.

The program has a Help file to guide you on how it works, although it is simple enough to run without much assistance.

You probably need to issue a chmod +x messenger before it can run. On some linux systems you may also need to issue a chmod +755 messenger.

Encrypt This! is a Firefox extension that allows public key like encryption as well as passphrase methods.

Visit the extensions homepage to set up public and private keys or just go ahead with a passphrase of your own creation.

Using this extension you can select text and have it encrypted in one click. This will allow you to send emails more securely by ensuring that nobody other than your intended recipient can read the decrypted text.

Come And Go Encryption provides an encryption program based off one-time pads.
Cum And Go Encryption is a very basic program to encrypt or decrypt a program using a variant of the one-time pad. This allows for almost uncrackable encryption.
Why is it still crackable? The program uses one relatively small key to XOR the contents of another file, encrypting it.
A one-time pad uses a very large key (about the same size as the file/data to encrypt) and is completely random. Still, the encryption is good enough to mask the identity of a program or document, or stop someone from accessing that document or program.
The origins of this program were an effort to stop a specific kind of movie and image from being viewed normally.
Installing is a breeze: simply run the program. Put it anywhere you like, it wont matter as long as you put the full path to the program to encrypt/decrypt.
Run the program to see a basic description of its use.
This program works very well in windows but was designed for use in Linux/UNIX. The stdout option allows for decryption to standard output, allowing one to pipe the programs decrypted data to another program.
This could be used to view an encrypted movie without having to write the whole movie to disk; the only problem with this is that on some Operating Systems pipes are slow and inefficient, especially with a high-bitrate movie. Steps will be taken to speed this up in the future.
Enhancements:
- Fix password use so the password is not shown in "encrypted" files
- Use an actual encryption method, and not a cheesy XOR
- Adapt CAG to use modules such as SHA, Crypt, MD5, and others

TrueCrypt is free open-source disk encryption software.
Main features:
- It can create a virtual encrypted disk within a file and mount it as a real disk.
- It can encrypt an entire hard disk partition or a device, such as USB memory stick, floppy disk, etc.
- Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
- 1) Hidden volume (more information may be found here).
- 2) No TrueCrypt volume can be identified (TrueCrypt volumes cannot be distinguished from random data).
- Encryption algorithms: AES-256, Blowfish (448-bit key), CAST5, Serpent (256-bit key), Triple DES, and Twofish (256-bit key). Supports cascading (e.g., AES-Twofish-Serpent).
- Based on Encryption for the Masses (E4M) 2.02a, which was conceived in 1997.
Enhancements:
- Access rights are now elevated using sudo.
- Volumes can be dismounted only by the user who mounted it or by root.
- Support for writing data to file-hosted volumes located on devices that use a sector size other than 512 bytes (e.g. new HDD types, DVD-RAM, some flash drives) was added.
- A TrueCrypt volume is now automatically dismounted if its host device is inadvertently removed.
- The maximum allowed size of FAT32 volumes was increased to 2 TB.
- Support for big-endian platforms was improved. 64-bit block ciphers are being phased out; such volumes can still be mounted, but not created.

EasyCrypt is a small Python program that encrypts or dercypts files using AES encryption standard.

The program is still in early development. It can be used to easily encrypt your files on the go with pretty good security. It works or all systems that support Python. (Windows, Unix, MacOS, ...).

The program uses PyCrypto (link here) library to encrypt/decrypt the file. (Pyhton doesnt have yet an official implementation of the AES algorythm). Since the sourceforge doesnt have any downloadable package, I included in the cvs tree the version of the library used in the program.

Usage (example):

> pycrypt --encrypt TestFile.jpg TestFile.jpg_enc mypassword
(An encrypted file has been created)
> pycrypt --decrypt TestFile.jpg_enc DecryptedFile.jpg mypassword
(The original file is recovered)

Crypt is a small C program that utilizes the crypt(3) function to include DES password checking/encryption in shell scripts.

Usage:

./crypt < salt > < string >

Cryptomak Cipher Tools project consists of a collection of PHP scripts for encryption purposes.
Cryptomak contains a cipher and tools for encryption utilities written in PHP, including substitution, vigenere, affine, transposition, and index of coincidence.
It is powered by the Phrame platform which implements MVC design and the Smarty template engine.
Enhancements:
- It is programmed in modular programming. Welcome to OOP world ;)
- Using Phrame as web aplication platform which implements MVC design
- Using Smarty as template engine at the view layer
- New hashing script added
- Better web design