Blowfish is a symmetric encryption algorithm designed in 1993 by Bruce Schneier as an alternative to existing encryption algorithms. Blowfish has a 64-bit block size and a variable key length – from 32 bits to 448 bits. It is a 16-round Feistel cipher and uses large key-dependent S-boxes.

Symmetric Ciphers Online allows you to encrypt or decrypt arbitrary message using several well known symmetric encryption algorithms such as AES, 3DES, or BLOWFISH. Symmetric ciphers use the same (or very similar from the algorithmic point of view) keys for both encryption and decryption of a message. Blowfish is suitable for application where the key does not change frequently, like a communication link or an automatic file encryptor. It is significantly faster than most encryption algorithm when on 32-bit microprocessor with large data caches. (Fast Software Encryption, Cambridge Security Workshop Proceedings December 1993) Blowfish has a good encryption rate in software and until 2008 no cryptanalytic attack model of it has been found. However, the AES block cipher algorithm now has more attention. Schneier made Blowfish as a general-purpose algorithm, to be used as a replacement for the old DES algorithm and to remove the problems and difficulties of other Blowfish is a variable-length key symmetric block cipher, designed in 1993 by Bruce Schneier and included in a large number of cipher suites and encryption products. Schneier designed Blowfish as a general-purpose algorithm, intended as an alternative to the aging DES. Blowfish is not a hashing algorithm. It's an encryption algorithm. What that means is that you can encrypt something using blowfish, and then later on you can decrypt it back to plain text. SHA512 is a hashing algorithm. That means that (in theory) once you hash the input you can't get the original input back again.

Package blowfish implements Bruce Schneier's Blowfish encryption algorithm. Blowfish is a legacy cipher and its short block size makes it vulnerable to birthday bound attacks (see ).

A Java implementation of cryptographic algorithms, including Blowfish and Twofish. The package contains a light-weight API suitable for use in any environment, with the additional infrastructure to conform the algorithms to the JCE framework. Blowfish algorithm has gained lots of popularity especially due to its free license. It uses a variable lenght key, from 32 to 448-bit, although most of commercial and non comercial products uses for the strongest 448 bit encryption with blowfish. In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits. It was one of the five finalists of the Advanced Encryption Standard contest, but it was not selected for standardization. Twofish is related to the earlier block cipher Blowfish.

Like Blowfish, Twofish is freely available to anyone who wants to use it. As a result, you’ll find it bundled in encryption programs such as PhotoEncrypt, GPG, and the popular open source software TrueCrypt. 5. AES. The Advanced Encryption Standard (AES) is the algorithm trusted as the standard by the U.S. Government and numerous organizations.

It depends whether you need symetric or asymetric encryption and if you like to have a block cipher or a streaming cipher. If you want to use a blockcipher it also depends whether you are goind to use it on embedded devices, smartphone or large co encryption algorithm Test Driver for Crypto. a Class C Library of spreadsheets P encryption algorithm Test Driver for Crypto. a Class C Library of spreadsheets Primitives :- To generate an RSA key cryptest g-To encrypt an d decrypt a string using RSA cryptest r-To calcu late MD5, SHS, and RIPEMD algorithms-160 message digests : cryptest m file-To encrypt and decrypt a string usi