[oc] Twofish implementation question

[spyros_s@freemail.gr (spyros)]

Hi all,
sorry if this is already answered before, but I searched and I didn't find anything.My problem is this: I have problem understanding the way the multiplication with the MDS of the twofish algorithm works. I have downloaded the core that is offered and tried to study the code, but I still have problem in understanding the algorithm. If any of you have studied the subject, can someone give me a summary about the way a multiplication in the Galois field GF(2^8) works and how do we implement it in hardware?
I really appreciate in advance any help I may get.
spyros


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