Help! The following affine cipher with the key k = (a, b) uses only uppercase letters of English alphabet encoded aselements of Z26 :ABCD EF12GHKILIM345679 10 11|12W xY|Z8NO PO RSUlV13 14 15 16| 17 18 19 20|21 22 23 24 25Encryption function is: y = ax + b mod 26Assume you have obtained the ciphertext sequence: E V W J C PU W ZYand the initial 2 letters of the plaintext are:U Na) Find the key, k = (a,b).b) Write the decryption function: x = a¬1(y – b) mod 26c) Decrypt the rest of the ciphertext.

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Description: Help! The following affine cipher with the key k = (a, b) uses only uppercase letters of English alphabet encoded aselements of Z26 :ABCD EF12GHKILIM345679 10 11|12W xY|Z8NO PO RSUlV13 14 15 16| 17 18 19 20|21 22 23 24 25Encryption function is: y = a

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The following affine cipher with the key k = (a, b) uses only uppercase letters of English alphabet encoded as elements of Z26 : ABCD EF 012 GH KILIM 3 4 56 7 9 10 11|12 W XY|Z 8 NOPO RS 13 14 15 16 17 18 19 2o 21 22 23 24 25 UlV Encryption function is: y = ax + b mod 26 Assume you have obtained the ciphertext sequence: E V W JC PU W ZY and the initial 2 letters of the plaintext are: U N a) Find the key, k = (a, b). b) Write the decryption function: x = a-1(y – b) mod 26 c) Decrypt the rest of the ciphertext.

The following affine cipher with the key k = (a, b) uses only uppercase letters of English alphabet encoded as elements of Z26 : ABCD EF 012 GH KILIM 3 4 56 7 9 10 11|12 W XY|Z 8 NOPO RS 13 14 15 16 17 18 19 2o 21 22 23 24 25 UlV Encryption function is: y = ax + b mod 26 Assume you have obtained the ciphertext sequence: E V W JC PU W ZY and the initial 2 letters of the plaintext are: U N a) Find the key, k = (a, b). b) Write the decryption function: x = a-1(y – b) mod 26 c) Decrypt the rest of the ciphertext.

Elements Of Modern Algebra

8th Edition

ISBN:9781285463230

Author:Gilbert, Linda, Jimmie

Publisher:Gilbert, Linda, Jimmie

Chapter2: The Integers

Section2.8: Introduction To Cryptography (optional)

Problem 15E: a. Excluding the identity cipher, how many different translation ciphers are there using an alphabet...

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