Strengthening Hash Functions using Block Symmetric Key Encryption Algorithm

With the requirement of high speed network protocols, fast message integrity and authentication services are at the top most priority. Currently many integrity techniques, that involve hashing, are being used and developed, but almost every technique faces one or other attack or any other security or performance related issue. The chief problem being faced is the forgery of hash value, being transferred with message, as the adversary may create fraud hash value for the changed message. This paper introduces a DES encryption based hashing technique for message integrity that provides the authentication that message was sent from original sender only, and analyzes its strength. The security of proposed method is based on the strength of the underlying one-way hash function