PSYCHOLOGY

Psychology

Psychology

In this paper, we focus our attention on the Case Studies in Symmetric Key Cryptography. We first examine the execution of eight widely known strong symmetric-key ciphers. We analyze their performance on detailed microarchitectural models, where we are able to clearly show their performance and the bottlenecks that slow their progress. Armed with these insights, we propose architectural extensions that streamline cipher kernel processing. The new instructions speed modular arithmetic, substitutions, general bit permutations, and rotates. We recode the cipher using these new instructions and then examine their performance on microarchitectural models with varying levels of support for fast cryptography. ...