# Cryptography Teacher Question:

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## On perform the Mix Columns transformation for the sequence of bytes “67 89 AB CD” we get output

a) {08 55 FF 18}

b) {28 45 EF 08}

c) {28 45 FF 18}

d) {25 35 EF 08}

## Answer:

b) {28 45 EF 08}

Explanation: Perform the mix columns transformation to obtain the output {28 45 EF 0A}.

Explanation: Perform the mix columns transformation to obtain the output {28 45 EF 0A}.

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