Overall, Crypt4Free is neat little utility that supports various formats and medium. It has a .ZIP support and can encrypt data at DESX (128-bit) and Blowfish (448-bit). It is lightweight, easy to use and free. If you are in the market for a basic encryption tool, then Crypt4Free should be something that you check out.
Blowfish is a 16 round feistel chiper that has key lenght from 32 to 448-bit and use large key dependent s boxes. Blowfish is similar to Cast 128 structuraly. In blowfish, every line represents 32 bits. Two subkey arrays are kept the 18 entry P-array and four 256-entry S boxes, which takes 8 bit input while producing 32 bit output. Blowfish is a brute-force resistant encryption algorithm, that requires over 500 iterations (i think like 508) of the algorithm to test a single key. The full encryption key length is used, 448 bits. Tags: Compression and Encryption - Offers 448 bit encryption and very high compression.. Open source secure algorithm - Secure IT uses Blowfish, one of the strongest cryptographic algorithms in existence. Also supports AES encryption algorithm, the new official US government standard. Built in file shredder - When files are deleted with standard methods, they are not completely removed from the hard Blowfish Encryption. The Blowfish algorithm is a symmetric block cipher that can be used as a drop-in replacement for DES or IDEA. It takes a variable-length key, from 32 bits to 448 bits, making it ideal for both domestic and exportable use. The encryption of the data 64-bit input is denoted with an x, while the P-array is denoted with a Pi (where i is the iteration). 6 The Blowfish Algorithm Key Expansion (cont) Blowfish has a 64-bit block size and a key length of anywhere from 32 bits to 448 bits (32-448 bits in steps of 8 bits default 128 bits). Bcrypt is a cross platform file encryption utility. Encrypted files are portable across all supported operating systems and processors. Passphrases must be between 8 and 56 characters and are hashed internally to a 448 bit key. However, all characters supplied are significant. The stronger your passphrase, the more secure your data.
Ok. So I recently signed up for Crashplan which uses 448-bit Blowfish to encrypt the data you send them, and the more I do research on Blowfish the more it sounds like the 64-bit block size is totally insufficient for the size of the volumes they will be backing up.
Marx 448 Bit Encryption v2.0 uses blowfish with a full strength 448 Bit key and the Tiger Hashing Algorithm to ensure file integrity. This new version has a redesigned interface that makes the The key size is between 32 and 448 bits, with 448 bits obviously being the strongest encryption. It is considered very good for smaller amounts of data (like e-mails etc.), but becomes less good with very large amounts of data (several GB's) because of the relatively small block size (64 bits) used in the cipher.
The 2048-bit is about the RSA key pair: RSA keys are mathematical objects which include a big integer, and a "2048-bit key" is a key such that the big integer is larger than 2 2047 but smaller than 2 2048.. The 256-bit is about SSL.
448-bit encryption approved A Tennessee firm wins U.S. approval to export its new software with encryption far stronger than most current export licenses. June 8, 1998 2:00 p.m. PT