Which of the following was the first poly graphic cipher to be able to operate on more than 3 letters at once?(a) autokey cipher(b) hill cipher(c) one time pad cipher(d) playfair cipherI got this question in quiz.The doubt is from Cryptography in section Cryptography of Data Structures & Algorithms II

Which of the following was the first poly graphic cipher to be able to

1.	Which of the following was the first poly graphic cipher to be able to operate on more than 3 letters at once?(a) autokey cipher(b) hill cipher(c) one time pad cipher(d) playfair cipherI got this question in quiz.The doubt is from Cryptography in section Cryptography of Data Structures & Algorithms II
Answer» RIGHT choice is (b) hill CIPHER Explanation: Poly graphic cipher is a type of substitution cipher in which substitution is performed over a BLOCK of LETTERS. Hill cipher was the first poly graphic cipher to be able to operate on more than 3 letters at once.

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