Message Digest Algorithm 2 (MD2) is a cryptographic hash function developed by Ronald Rivest in 1989. The algorithm is optimized for 8-bit computers. MD2 is specified in RFC 1319.1 Description
The 128-bit hash value of any message is formed by padding it to a multiple of the block length on the computer (128 bits or 16 bytes) and adding a 16-byte checksum to it. For the actual calculation, a 48-byte auxiliary block and a 256-byte table containing the random digits of pi are used. Once all of the blocks of the (lengthened) message have been processed, the first partial block of the auxiliary block becomes the hash value of the message.
2 See also
3 References
- Burt Kaliski, Message Digest Algorithm, April 1992.
- Frédéric Muller, The MD2 Hash Function is Not One-Way, in forthcoming proceedings of Asiacrypt 2004 (to be published).
- N. Rogier and Pascal Chauvaud, MD2 is not Secure without the Checksum Byte, Designs, Codes and Cryptography, 12(3), pp245–251, 1997.
Cryptographic hash functions
