Jean-Philippe Aumasson

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Title: BLAKE2

Abstract: We present the cryptographic hash function BLAKE2, an improved version of the SHA-3 finalist BLAKE optimized for speed in software. Target applications include cloud storage, intrusion detection, or version control systems. BLAKE2 comes in two main flavors: BLAKE2b is optimized for 64-bit platforms, and BLAKE2s for smaller architectures. On 64-bit platforms, BLAKE2 is often faster than MD5, yet provides security similar to that of SHA-3. We specify parallel versions BLAKE2bp and BLAKE2sp that are up to 4 and 8 times faster, by taking advantage of SIMD and/or multiple cores. BLAKE2 has more benefits than just speed: BLAKE2 uses up to 32% less RAM than BLAKE, and comes with a comprehensive tree-hashing mode as well as an efficient MAC mode.

This is a join work with Samuel (@sevenps), Zooko (@zooko), and Chris (@codesinchaos).

Slides: to appear