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In a transposition cipher, the plaintext is constructed by the ________ of the ciphertext.

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In a transposition cipher, the plaintext is constructed by the ________ of the ciphertext.

(a) permutation

(b) combination

(c) sequence

(d) series

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Question is from Cryptography in division Number Theory and Cryptography of Discrete Mathematics

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Correct choice is (a) permutation

Easiest explanation: In cryptography, a method of encryption where the positions of plaintext held by units are shifted according to a regular system so that the ciphertext constructs a permutation of the plaintext is termed as transposition cipher.

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