Abstract

Network Security has a major role in the development of data communication system, where more randomization in the secret keys increases the security as well as the complexity of the cryptography algorithms. In the recent years network security has become an important issue. Cryptography has come up as a solution which plays a vital role in the information security system against various attacks. This security mechanism uses the AES algorithm to scramble data into unreadable text which can only be decrypted with the associated key. The AES algorithm is limited only for text as an input. It also has, the more time complexity. So it suffers from vulnerabilities associated with another type of input and time constraints. So its challenge to implement the AES algorithm for various types of input and require less decryption time. The propose work demonstrate implementation of a 128-bit Advanced Encryption Standard (AES), which consists of both symmetric key encryption and decryption algorithms for input as a text, image and audio. It also gives less time complexity as compared to existing one. At the last stage comparing the time complexity for encryption and decryption process for all three types of input. This paper also demonstrates a side channel attack on the standard software implementation of the AES cryptographic algorithm.de