You have found one page ciphertext which was encrypted using Vigenere cipher. You found the string TICRMQUIRTJR occurs three times in the text. The first occurrence starts at character position 10 in the text, the second at character position 241, and the third at character position 472. By using Kasisiki test, you may find the possible lengths of key word. Suppose you make a guess that the above repeating ciphertext is the encryption of the plaintext cryptography If your guess is right, find the keyword. errands coached correct coexist erasion

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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You have found one page ciphertext which was encrypted using
Vigenere cipher. You found the string
TICRMQUIRTJR
occurs three times in the text. The first occurrence starts at
character position 10 in the text, the second at character position
241, and the third at character position 472. By using Kasisiki test,
you may find the possible lengths of key word. Suppose you make a
guess that the above repeating ciphertext is the encryption of the
plaintext
cryptography
If your guess is right, find the keyword.
errands
coached
correct
coexist
erasion
Transcribed Image Text:You have found one page ciphertext which was encrypted using Vigenere cipher. You found the string TICRMQUIRTJR occurs three times in the text. The first occurrence starts at character position 10 in the text, the second at character position 241, and the third at character position 472. By using Kasisiki test, you may find the possible lengths of key word. Suppose you make a guess that the above repeating ciphertext is the encryption of the plaintext cryptography If your guess is right, find the keyword. errands coached correct coexist erasion
Solve: 10x + 8 = 24 mod 26.
O 12, 24
O 12, 25
O 24 only
O 12 only
O 25 only
Transcribed Image Text:Solve: 10x + 8 = 24 mod 26. O 12, 24 O 12, 25 O 24 only O 12 only O 25 only
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