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The matrix used in mixcolumn operation in AES for 192 bit and 256 bit key !!

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Mukesh10

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Hello everyone

I am working on AES (Advanced Encryption Standard). I want to know the matrix used in mixcolumn operation For 192 bit key and for for 256 bit key as i know the matrix used in 128 bit key that is

2 3 1 1
1 2 3 1
1 1 2 3
3 1 1 2


Thanks and Regards

Mukesh Goyal
 

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