• Mr. Aby Thomas
• Mr Ashok Babu

From ancient times the idea of hiding the data from unauthorized parties were in practice. The process of hiding and securing that data is called encryption and it was enabled throughout history through various methods. from the ancient arab traders to the present military applications these methods are preferentially used. The IBM has developed a new technological approach called Advanced Encryption Standard and is adopted by NIST, in order to solve the new challenges that had been evolved until 1998. As time passed by, the existing system have also become vulnerable to various attacks like brute force attack, algebraic attacks etc. In this study we will attempt to review the different versions of the AES, the different predecessors of AES, Data Encryption Standard and the broad history that is concerned with the AES and the different challenges of the predecessors of AES that led to the need of AES.

Cryptography, AES.

"A survey on history and working of DES and AES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.189-192, June 2019, Available :http://www.jetir.org/papers/JETIR1907780.pdf

"A survey on history and working of DES and AES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp189-192, June 2019, Available at : http://www.jetir.org/papers/JETIR1907780.pdf