Version 1.2 of the main document and of the implementation are now available! In addition, a new version of KeccakTools is also available.

The changes include:

• A new optimized implementation using SIMD instructions is available.
• In the main document, we added a 2-page specifications summary, more explanations on difference propagation and correlation properties of χ, ANF tests also on the inverse of Keccak-f and new software performance results in general and regarding SIMD instructions in particular. (A change log in the appendix of the main document brings you directly to the changed sections.)
• The new version of KeccakTools is able to generate the source code of the new optimized implementation.

Note that the Keccak algorithm, specifications and test vectors have not changed since the initial NIST submission.