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Assume we perform a known-plaintext attack against DES with one pair of plaintext and ciphertext. How many keys do we have to test in a worst-case scenario if we apply an exhaustive key search in a straightforward way? How many on average?

Respuesta :

Answer:

[tex]2^{55}[/tex] keys in a worst case scenario

Explanation:

So, Average will be : [tex]2^{56} /2[/tex]

[tex]2^{55}[/tex](Answer)

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