Title: Enhanced SHA-1 on Parsing Method and Message Digest Formula

Year of Publication: Feb - 2015
Page Numbers: 1-9
Authors: Christine Charmaine G. San Jose, Bobby D. Gerardo, Bartolome T. Tanguilig III
Conference Name: The Second International Conference on Electrical, Electronics, Computer Engineering and their Applications (EECEA2015)
- Philippines


The Secure Hash Algorithm is one of the most commonly used hashing algorithms on the time being. Experts are proposing for much secured SHA-1 because of some reports and study conducted on SHA-1 collision attacks. The aim of the enhanced Secure Hash Algorithm -1 (SHA-1) is to strengthen its original version that is expected to resist possible SHA-1 collision attacks. The enhanced SHA-1 had integrated the following modification: 1) Enhancement on the preprocessing, specifically on the parsing method. 2) The message digest and the final message digest formula was enhanced by giving additional shifting, xoring and improved mathematical formula. The enhanced SHA-1 maintains its original rounds which consist of 80 rounds and message digest output of 160 bit. Based from the result, the enhanced algorithm specifically on mathematical calculation of parsing method and message digest had shown great effects on its result on the hash value despite of a very minimal time delay, the enhanced algorithm is better and more secure.