Between 2007 and 2012 NIST ran a hash function competition to determine SHA-3. In the end Keccak was chosen as winner and became SHA-3.

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Problem implementing MixBytes functionality in Groestl

Disclaimer: School work. I am trying to implement Groestl through Java, and have got stuck on the MixBytes section which can be found here section 3.4.5 page 11. As per the description of matrix ...