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Which attack usually analyzes large amounts of plaintext/cipher text pairs created with the same key?
None of these
Linear Cryptanalysis
Known plaintext cryptosystem
Differential cryptanalysis
Differential cryptanalysis - in the broadest sense, it is the study of how differences in information input can affect the resultant difference at the output. Known-plaintext attack (KPA) is an attack model for cryptanalysis where the attacker has access to both the plaintext (called a crib), and its encrypted version (cipher text). These can be used to reveal further secret information such as secret keys and code books.
.............................. .............................. .............................. .............................. The answer has been corrected to linear Cryptanalysis. According to CISSP Study Guide 3rd edition ( Syngress - Eric Conrad): Linear Cryptanalysis is a known plaintext attack where the cryptanalyst finds large amounts of plaintext/ciphertext pairs created with the same key. The pairs are studied to derive information about the key used to create them.
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