Enriching Information Security via Hybrid of New Expand Rivest Shamir Adleman and Data Encryption Standard Cryptosystem

Abstract

Cryptography system gives security services ability to protect information from people who are authorized to use it. This research introduces elevated information security system via hybrid of new expand Rivest Shamir Adleman (RSA) and data encryption standard (DES) cryptosystem using appropriate standard lgorithms. An Expand Algorithm (ERSA) algorithm Key cryptosystem based on nth large prime number system was introduced. Then a hybrid between the Expand Algorithm (ERSA) with Data Encryption Standard (DES) was applied using four randomly selected variables, each generated from large factor of “N” prime numbers. The information undergoes a cypher text-decryption process which provides strong security and uphold high information confidentiality and integrity of data. Results showed that the use of ERSA and DES algorithm reduced the key generation period and its complexity analysis of encryption and decryption are stronger, unlike the application of traditional RSA algorithm.