Enhanced image encryption techniques using modified advanced encryption standard

Abstract

Protecting multimedia data has become an important and sensitive issue since vast exchange of multimedia data on the internet. For this purpose usually naïve approach is used which provides high level of security but it also need special, costly hardware for real time encryption. Such approach is not practical in situations where we have limited processing power, low bandwidth, and small storage of data. So there is an apparent tradeoff between security and the speed of encryption algorithms. In such situations selective encryption is suggested. We have proposed three new selective encryption techniques for image encryption. We modify AES and make it light and faster. We test our proposed techniques with Modified Advance Encryption Standard on text and images using c# .NET .Achieved results help us to conclude that selective image encryption techniques with MAES can be a better approach to decrease image encryption time. © 2012 Springer-Verlag.