Using the affine cipher, encrypt the string “TABLE” using the keys a = 3 and b = 2. Given the definition below: E(x) = a.x + b (mod 26) D(y) = a-1 .(x-b)(mod 26)

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
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  1. Using the affine cipher, encrypt the string “TABLE” using the keys a = 3 and b = 2. Given the definition below:

E(x) = a.x + b (mod 26)

D(y) = a-1 .(x-b)(mod 26)

2. You have been recently employed as part of a Network Snooping Association. You first task requires the use of a One-Time Pad to scramble a message. Given the Pad below:

PAD1: 25  17  12  11  22  1  26  2  29  3  11  15  22  5  15  25  30  4  16  1
Scramble the message “I_AM_ _PREGNANT._ _ _”. The result cipher text should be descrambled to get back the original message or plaintext.

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