Suppose that when a long string of text is encrypted using a Vigenre cipher, the same string

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Suppose that when a long string of text is encrypted using a Vigenère cipher, the same string is found in the ciphertext starting at several different positions. Explain how this information can be used to help determine the length of the key.

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 02, 2016 12:26 PM

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Suppose that when a long string of text is encrypted using a Vigenre cipher, the same string

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If l is the distance between the beginnings of the string tha...View the full answer

Discrete Mathematics and Its Applications

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