message digest no. 2 (MD2)
Message Digest no. 2 (MD2) is an algorithm used in authentication protocols based on one-way transmission using a hash function and a key. The algorithm is based on the checksum of a message. MD2 was developed by Ronald L. Rivest for 8-bit computers and is published in RFC 1319.
Other message digest algorithms include MD4 for digitalsignature encryption and MD5 for authentication.