Design and Implementation of AES using Hybrid Approach

Information system concentrates on integrity and confidentiality of data in communication process. To protect this data communicated over network from attackers is major challenge for data and telecommunication organization. Cryptography is used in organization to preserve confidentiality or security. AES is symmetric cryptographic algorithm recommended by NIST in 2001 for its easy implementation and strong security. In recent years, attackers are expert about all cryptographic algorithms including AES. Some effective variation to existing algorithm can make attacker’s task difficult. In this paper, valid variation is implemented to AES so to make attacker’s job tough. Key which is heart of cryptographic process is made dynamic using function of time mixed with salt which will make cryptography unbreakable and Substitute box (S-box) is converted to dynamic S-box to avoid study and analysis of static set of s-box. This hybrid variation implementation in AES makes it more strong and secure than traditional AES.