Faster and Timing-Attack Resistant AES-GCM

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Provided by: Katholieke Universiteit Leuven
Topic: Security
Format: PDF
The authors present a bit-sliced implementation of AES encryption in counter mode for 64-bit Intel processors. Running at 7.59 cycles/byte on a core 2, it is up to 25% faster than previous implementations, while simultaneously offering protection against timing attacks. In particular, it is the only cache-timing-attack resistant implementation offering competitive speeds for stream as well as for packet encryption: for 576-byte packets, they improve performance over previous bit-sliced implementations by more than a factor of 2.
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