Yousef Ali Al-Hammadi

Work place: United Arab Emirates University, UAE



Research Interests: Data Structures and Algorithms, Computational Mathematics, Computational Science and Engineering


Dr. Yousef Al Hammadi is currently an Assistant Professor at the Faculty of Information Technology (FIT) in the United Arab Emirates University. He received his Ph.D in Information Technology from Queensland University of Technology in January 2006. Dr Al Hammady’s current research interests include Algorithm, Public Key cryptology, Digital signature, Hash function, Math for crypto including primality test and Factoring

Author Articles
Reducing Hash Function Complexity: MD5 and SHA-1 as Examples

By Yousef Ali Al-Hammadi Mohamed Fadl Idris Fadl

DOI:, Pub. Date: 8 Jan. 2019

Hash functions algorithms also called message digest algorithms, compress a message input of an arbitrary length, and produce an output with a fixed length that is distributed randomly.

Several hash algorithms exist such as Md5 and SHA1. These algorithms verify data integrity and restrict unauthorized data modification. However, they experience some complexities, especially when implemented in bitcoin mining, and low computation devices, in particularly IoT devices. As a remedy, this paper suggests a new compression function that reduces the complexity of the hash function algorithms such as MD5 and SHA-1. Also, proves that we can obtain the same results which are achieved by the original compression function.

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