An Extended MD5(ExMD5) Hashing Algorithm for Better data Integrity

Recent developments in scientific and engineering applications communication are playing a major role in online transactions. All the transactions across the globe are shared by network. The integrity ensures that only authorized parties are able to modify the transmitted information. Modification includes writing, changing, changing status and delaying or replaying transmitted messages. The Message Digest functions MD4 and MD5 provide one-way function integrity in the form of octets, 32-bit and 64 bit words respectively. The extended MD5 (ExMD5) was designed to be somewhat more conservative than MD5 in terms of being more concerned with security. An extended MD5 hashing algorithm that follows five passes than MD5, which follows only four passes. In the proposed approach, the message is processed in 512-bit blocks and the message digest is a 128-bit quantity. Each stage consists of computing function based on the 512-bit message chunk and the message digest to produce a new intermediate value. The value of the message digest is the result of the output of the final block of the message. An extended MD5 hashing provides the better data integrity and the resulted values are compared against existing hashing algorithms such as MD4 and MD5 algorithms.