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2. Consider the DES algorithm. (1) Suppose that Ki = K2 = ... = K16. Show that all bits in C1 are equal and all
2. Consider the DES algorithm. (1) Suppose that Ki = K2 = ... = K16. Show that all bits in C1 are equal and all bits in Di are equal. (2) Show that there are exactly 4 DES keys for which all round keys are the same. They are called weak DES keys. (3) Determine these 4 weak DES keys. 2. Consider the DES algorithm. (1) Suppose that Ki = K2 = ... = K16. Show that all bits in C1 are equal and all bits in Di are equal. (2) Show that there are exactly 4 DES keys for which all round keys are the same. They are called weak DES keys. (3) Determine these 4 weak DES keys
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