(a) What is the best way to thwart exhaustive searches by cryptanalysts? (b) If a key is...
Question:
(b) If a key is 43 bits long, how much longer will it take to crack it by exhaustive search if it is extended to 45 bits?
(c) If it is extended to 50 bits?
(d) If a key is 40 bits long, how many keys must be tried, on average, to crack it?
(e) How long must a symmetric encryption key be to be considered strong today?
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a Simply make the key so long that the time needed for attackers to crack the ...View the full answer
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