A New Hash Function Based On The Hybrid Of Existing Message Digest Algorithms

Hash functions are modern cryptography that have been developed by cryptographers to make security applications for protecting the integrity of data. However, almost all hash functions are either unsecure or inefficient. Therefore, another better hash function is needed to be used as an alternative hash function. In this paper, authors aim to re-explore message digest algorithms then proposes a new hash function was developed to combine the optimized internal strength elements of the algorithms, namely MD5 and SHA-1 to obtain a basic operation of the new hash that overall enhance the security, but still efficient. The proposed new hash function has been evaluated and the results shown that its execution time are slightly shorter than the combination of (SHA-192+MD5) but almost as fast as with the combination of (SHA-1+MD5). In addition, its avalanche effects exceeds 50% (the ideal condition is around 50%). These are secure enough for security applications.