Performance Comparison of Asymmetric Cryptography (Case study- Mail message)

Abstract

Data encryption is well known as essential for today’s technology. ElGamal encryption and RSA algorithm is made before storing mails to mail server. ElGamal decryption and RSA decryption is made after retrieving mails from mail server. This system is implemented to secure mail server system for local government’s important mail messages. These algorithms consume a considerable amount of time and resources of memory, CPU time, and computation time to encrypt and decrypt data. This paper discuss the results comparison of these algorithms in term of encryption time, decryption time, and memory usage over variable file sizes. The results show that RSA does faster encryption process in compare with ElGamal. However, ElGamal decryption process is quicker than RSA. This system is also expressed comparison of storage Size between RSA and ElGamal. Both of these algorithms are cryptographic public-key algorithms but have roles in different techniques. This system is using C# programming language and SQL Server to store mail messages.