Wednesday, 21 January 2015

galois theory - Multiplicative Inverse in GF(28) using Extended Euclidiean Algorithm.

We know that the AES S-box is generated by determining the multiplicative inverse of a given number in GF(28). Considering this information, we have to explain:



what is {07}1 in GF(28)? This problem must be solved with Extended Euclidean algorithm.




Could someone please explain how to do this with a step by step example?

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