Search and implementation of diffusion matrices from algebraic-geometry codes

These programs were written for the SAC 2014 paper Diffusion Matrices from Algebraic-Geometry Codes with Efficient SIMD Implementation (see https://eprint.iacr.org/2014/551).

They include:

1. A search for block matrices using the automorphisms of the curve/code.
2. A search for random matrices.
3. SSE (assembly) implementation of one matrix both over F_2^4 and F_2^8 and of companion toy ciphers.

All are released under an MIT license (see LICENSE)

Contact: Pierre.Karpman@{inria.fr,gmail.com}