Explain the procedure of mix column transformation in AES with an exam | Cryptography 2076

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Cryptography20765 marksNumerical: AES mix column transformationAdvanced Encryption Standards

Explain the procedure of mix column transformation in AES with an example. [5]

MixColumns is one of the four transformations in each AES round (except the final round). It operates on the state column by column. Each column of the $4 \times 4$ state matrix is treated as a four-term polynomial over $GF(2^8)$ and is multiplied (modulo $x^4 + 1$ ) by a fixed polynomial. This st...

MixColumns is one of the four transformations in each AES round (except the final round). It operates on the state column by column. Each column of the $4 \times 4$ state matrix is treated as a four-term polynomial over $GF(2^8)$ and is multiplied (modulo $x^4 + 1$) by a fixed polynomial. This st...

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MixColumns is one of the four transformations in each AES round (except the final round). It operates on the state column by column. Each column of the $4 \times 4$ state matrix is treated as a four-term polynomial over $GF(2^8)$ and is multiplied (modulo $x^4 + 1$ ) by a fixed polynomial. This st...