⟩ 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}
b) {28 45 EF 08}
Explanation: Perform the mix columns transformation to obtain the output {28 45 EF 0A}.