Question
Alice uses quadruple DES encryption. To save time, she chooses two keys, K1 and K2, and encrypts via c=EK1(EK1(EK2(EK2(m)))). One day, Alice chooses K1 to
Alice uses quadruple DES encryption. To save time, she chooses two keys, K1 and K2, and encrypts via c=EK1(EK1(EK2(EK2(m)))). One day, Alice chooses K1 to be the key of all 1s and K2 to be the key of all 0s. Eve is planning to do a meet-in-the-middle attack, but after examining a few plaintextciphertext pairs, she decides that she does not need to carry out this attack. Why?
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Fundamentals Of Database Management Systems
Authors: Mark L. Gillenson
2nd Edition
0470624701, 978-0470624708
