Free public key cryptography software for linux

C++ Elliptic Curve Cryptography library is a C++ library for elliptic curves cryptography.
Libecc is a C++ elliptic curve cryptography library that supports fixed-size keys for maximum speed.
The goal of this project is to become the first free Open Source library providing the means to generate safe elliptic curves, and to provide an important source of information for anyone with general interest in ECC.
Enhancements:
- This version brings the code completely up to date again with the latest of version of the working set (autoconf, compiler, etc.).
- The previous version was almost two years old and didnt even compile anymore.

Eureka Public Key was created due to numerous requests for a public key application using our strong encryption techniques. The basic principle for its use is one creates their own public key and distributes the key to whomever they will be transferring encrypted files with.

When one receives a key, they import it into their key database. You can create and import as many keys as you wish. Both public keys are used in the cryption process. You select your particular public key to use and the public key of the person who will receive it.

When a file has been received you put in your public key that matches the one they used and select their public key that was used in the encryption. See the Encryption, Decryption and Import/Export sections for more information on these topics. To create a public key, click on Keys then Create Public Key or click on the gold key icon under the menu items.

All you have to do is define a name for the public key and click on Create. All encrypted files will be written to the Encryptions folder. Likewise, all decrypted files will go to the Decryptions folder. If a file already exists with the same name, it will be overwritten.

Encryption:

To Encrypt a file, click on File then Encrypt.

All you have to do is select Your public key, their public key and click on Encrypt or press enter then select the file you want to process.

The file selected will be encrypted and then placed in your Encryptions folder. Now you can send this file in the manner you prefer.

Note that this application encrypts in a binary format. In other words, it uses the full 256 character set and is not a text file. You will need to send it as an attachment if you are using email to transmit it.

Decryption:

To Decrypt a file, click on File then Decrypt.

All you have to do is select Your public key, their public key then click on Decrypt and select the file you want to process.

The file selected will be decrypted and then placed in your Decryptions folder.

The Legion of the Bouncy Castle Java Cryptography API provides a lightweight cryptography API in Java. A provider for the JCE and JCA, a clean-room implementation of the JCE 1.2.1, generators for Version 1 and Version 3 X.509 certificates, generators for Version 2 X.509 attribute certificates, PKCS12 support, and APIs for dealing with S/MIME, CMS, OCSP, TSP, and OpenPGP. Versions are provided for the J2ME, and JDK 1.0-1.5.
Main features:
- A lightweight cryptography API in Java.
- A provider for the JCE and JCA.
- A clean room implementation of the JCE 1.2.1.
- A library for reading and writing encoded ASN.1 objects.
- Generators for Version 1 and Version 3 X.509 certificates, Version 2 CRLs, and PKCS12 files.
- Generators for Version 2 X.509 attribute certificates.
- Generators/Processors for S/MIME and CMS (PKCS7).
- Generators/Processors for OCSP (RFC 2560).
- Generators/Processors for TSP (RFC 3161).
- Generators/Processors for OpenPGP (RFC 2440).
- A signed jar version suitable for JDK 1.4/1.5 and the Sun JCE.

LibTomCrypt is a comprehensive, modular, and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo- random number generators, public key cryptography, and a plethora of other routines. It has been designed from the ground up to be very simple to use. It has a modular and standard API that allows new ciphers, hashes, and PRNGs to be added or removed without change to the overall end application. It features functions for easy handling and a complete user manual which has many source snippet examples.
LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.
LibTomCrypt has been designed from the ground up to be very simple to use. It has a modular and standard API that allows new ciphers, hashes and PRNGs to be added or removed without change to the overall end application. It features easy to use functions and a complete user manual which has many source snippet examples.
LibTomCrypt is free for all purposes under the public domain. This includes commercial use, redistribution and even branching.
Main features:
- Public domain and open source.
- Written entirely in portable ISO C source (except for things like RNGs for natural reasons)
- Builds out of the box on virtually every box. All that is required is GCC for the source to build.
- Includes a 90+ page user manual in PDF format (with working examples in it)
- Block Ciphers
- Ciphers come with an ECB encrypt/decrypt, setkey and self-test interfaces.
- All ciphers have the same prototype which facilitates using multiple ciphers at runtime.
- Some of the ciphers are flexible in terms of code size and memory usage.
- Ciphers Supported.
- Blowfish
- XTEA
- RC5
- RC6
- SAFER+
- Rijndael (aka AES)
- Twofish
- SAFER (K64, SK64, K128, SK128)
- RC2
- DES, 3DES
- CAST5
- Noekeon
- Skipjack
- Anubis (with optional tweak as proposed by the developers)
- Khazad
- Changing Modes
- Modes come with a start, encrypt/decrypt and set/get IV interfaces.
- Mode supported.
- ECB
- CBC
- OFB
- CFB
- CTR
- One-Way Hash Functions
- Hashes come with init, process, done and self-test interfaces.
- All hashes use the same prototypes for the interfaces.
- Hashes supported.
- MD2
- MD4
- MD5
- SHA-1
- SHA-224/256/384/512
- TIGER-192
- RIPE-MD 128/160
- WHIRLPOOL
- Message Authentication
- FIPS-198 HMAC (supports all hashes)
- FIPS pending OMAC1 (supports all ciphers)
- PMAC Authentication
- Message Encrypt+Authenticate Modes
- EAX Mode
- OCB Mode
- Pseudo-Random Number Generators
- Yarrow (based algorithm)
- RC4
- Support for /dev/random, /dev/urandom and the Win32 CSP RNG
- Fortuna
- SOBER-128
- Public Key Algorithms
- RSA (using PKCS #1 v2.1 and PKCS #1 v1.5)
- DH (using ElGamal signatures and simple DH encryption)
- ECC (over Z/pZ, ElGamal Signatures, simple DH style encryption)
- DSA (Users make their own groups)
- Other standards
- PKCS #1 (both v1.5 and v2.0 padding)
- PKCS #5
- ASN.1 DER for INTEGER types.
Enhancements:
- The ECC code was fixed, cleaned, and improved.
- GCM was fixed.
- UTF8 support was added to the ASN1 code.
- The documentation was improved.
- The published version of the manual is included.

Crypto++ project is a free C++ class library of cryptographic schemes.
Main features:
- a class hierarchy with an API defined by abstract base classes
- AES (Rijndael) and AES candidates: RC6, MARS, Twofish, Serpent, CAST-256
- other symmetric block ciphers: IDEA, DES, Triple-DES (DES-EDE2 and DES-EDE3), DESX (DES-XEX3), RC2, RC5, Blowfish, Diamond2, TEA, SAFER, 3-WAY, GOST, SHARK, CAST-128, Square, Skipjack, Camellia, SHACAL-2
- generic cipher modes: ECB, CBC, CBC ciphertext stealing (CTS), CFB, OFB, counter mode (CTR)
- stream ciphers: Panama, ARC4, SEAL, WAKE, WAKE-OFB, BlumBlumShub
- public-key cryptography: RSA, DSA, ElGamal, Nyberg-Rueppel (NR), Rabin, Rabin-Williams (RW), LUC, LUCELG, DLIES (variants of DHAES), ESIGN
- padding schemes for public-key systems: PKCS#1 v2.0, OAEP, PSS, PSSR, IEEE P1363 EMSA2 and EMSA5
- key agreement schemes: Diffie-Hellman (DH), Unified Diffie-Hellman (DH2), Menezes-Qu-Vanstone (MQV), LUCDIF, XTR-DH
- elliptic curve cryptography: ECDSA, ECNR, ECIES, ECDH, ECMQV
- one-way hash functions: SHA-1, MD2, MD4, MD5, HAVAL, RIPEMD-128, RIPEMD-256, RIPEMD-160, RIPEMD-320, Tiger, SHA-2 (SHA-224, SHA-256, SHA-384, and SHA-512), Panama, Whirlpool
- message authentication codes: MD5-MAC, HMAC, XOR-MAC, CBC-MAC, DMAC, Two-Track-MAC
- cipher constructions based on hash functions: Luby-Rackoff, MDC
- pseudo random number generators (PRNG): ANSI X9.17 appendix C, PGPs RandPool
- password based key derivation functions: PBKDF1 and PBKDF2 from PKCS #5
- Shamirs secret sharing scheme and Rabins information dispersal algorithm (IDA)
- DEFLATE (RFC 1951) compression/decompression with gzip (RFC 1952) and zlib (RFC 1950) format support
- fast multi-precision integer (bignum) and polynomial operations, with SSE2 optimizations for Pentium 4 processors, and support for 64-bit CPUs
- finite field arithmetics, including GF(p) and GF(2^n)
- prime number generation and verification
- various miscellaneous modules such as base 64 coding and 32-bit CRC
- class wrappers for these operating system features (optional):
- high resolution timers on Windows, Unix, and MacOS
- Berkeley and Windows style sockets
- Windows named pipes
- /dev/random and /dev/urandom on Linux and FreeBSD
- Microsofts CryptGenRandom on Windows
- A high level interface for most of the above, using a filter/pipeline metaphor
- benchmarks and validation testing
- FIPS 140-2 Validated
Enhancements:
- This release added VMAC and Sosemanuk, and improved the speed of several other algorithms using x86/x86-64/MMX/SSE2 assembly.
- Random number generators and DSA-like signature algorithms were modified to reduce the risk of reusing random numbers and IVs after virtual machine state rollback.

People Search and Public Record Toolbar is a Firefox extension is a handy menu tool for investigators, reporters, legal professionals, real estate agents, online researchers and anyone interested in doing their own basic people searches and public record lookups as well as background research.
Find past friends, relatives, classmates, coworkers, military buddies or do background research on people and businesses.
This useful extension offers you the following free people and public record searches at the click of a mouse:
- Free People Searches: White Pages, 411, DA Plus, Zaba Search, Zoom Info, Google, International Phone Directories, Google Image Search and Riya photo search.
- Reverse Phone Numbers: White Pages, DA Plus, Google, Land Line or Cell Phone? Search, Reverse Payphone and Do Not Call List.
- Reverse Addresses: White Pages, DA Plus, Google, Mail Drop Search and Whois Lookup.
- Area Code, Zip Code and International Calling Code Searches.
- Yellow Pages & Local Searches: White Pages Yellow, DA Plus Yellow, Google Local and Yahoo Local.
- Public Record Searches: Skipease Public Record Directory, Search Systems Public Record Directory, Social Security Number Searches, NETRonline Property Records, Zillow Property Values, Trulia Real Estate Search, Yahoo Real Estate and NACO US County Information.
- Criminal Searches: Inmate Locators and National Sex Offender Registry.
- Maps & Satellites: Google Maps, Map Quest, Yahoo Maps, Google Earth, Terra Server.
- Government Phone Directories: US Blue Pages, Canada GEDS.
- US Government Search Engines: FirstGov and Google Government Search.
- News & Blog Searches: Google News, Yahoo News, Technorati, IceRocket and Google Blog Search.
- Business & Finance: Alibaba, Business.com, Thomas Registry, Google Finance, Yahoo Finance.
- Jobs & Classifieds: Indeed Meta Job Search, Simply Hired Meta Job Search, Dice Jobs, Hot Jobs, Monster Jobs, Craigslist Classifieds.
- Social Network Sites: Facebook, Friendster, MySpace, Tribe, Xanga.
This extension contains NO malicious scripts or code; no malware, spyware or adware of any kind. This extension does NOT record personal or surfing information from users. If you dont believe me, then check the source code on the extension after you download it. There is absolutely no Spyware or malware of any kind and the same person continues to attack this extension and defame it using numerous different logon ids.

Cryptonit project is a client side cryptographic tool which allows you to encrypt/decrypt and sign/verify files with PKI (Public Key Infrastructure) certificates.
Main features:
- Encryption/decryption based on highly reliable algorithms
- Signature/verification procedures ensuring tamper-proof documents
- Use of passwords, certificates & smart (chip) cards for file encryption
- Address book for saving and organizing contacts
- Ability to import contacts and their certificates from the corporate directory (LDAP import)
- Multiple user account management
- Interfaces in both English and French
- CRL download
- RSA cryptography (public key cryptography standard)