Evaluating time and throughput at different modes of operation in AES algorithm

The analysis of data encryption algorithm performance is becoming an increasing concern. Since most of the algorithms are involved in other applications such as banking services, e-government and online applications, implementation issues are practical concerns. Many experiments have been proposed to compare these techniques based on several parameters such as encryption time, decryption time and memory usage, using variable text files and key sizes. Mode of operation depicts how to excite and encrypt single-block to transform size of data bigger than a block. There are multiple schemes of cipher which can be applied to strengthen the protection of the application. The mostly common techniques are Electronic Codebook-ECB, Chain Block Chaining mode(CBC), Cipher Feedback mode(CFB), and Output Feedback(OFB). This paper presents a summary of several performance evaluation criteria applied to encryption techniques. Also, we analyze the performance of the modes of operation in the AES algorithm based on cipher time and throughput. Different research techniques, e.g. Anova, have been used to conduct the analysis. Different file types have been used to conduct the experiments i.e. text, image and video. The work concluded that the modes ECB, CBC, CFB, and OFB are significantly different in terms of throughput while they are not significantly different in terms of encryption time with 95% confidence level.