What kind of attack on double des makes it useless

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Reference no: EM131907088

Problem

1. Why does the round-key generator need a parity drop permutation?

2. What is the difference between a weak key, a semi-weak key, and a possible weak key?

3. What is double DES? What kind of attack on double DES makes it useless?

4. What is triple DES? What is triple DES with two keys? What is triple DES with three keys?

Reference no: EM131907088

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