Question

If weak keys are used in encryption by using DES, then the outcome of the permuted choice 1 (PC1) in the DES key schedule leads to round keys being either all zeros, all ones or alternating zero-one patterns. Which of the following hex representations is a weak key?

Answer 1

If weak keys are used in encryption by using DES, then the outcome of the permuted choice 1 (PC1) in the DES key schedule leads to round keys being either all zeros, all ones or alternating zero-one patterns. Which of the following hex representations is a weak key?