Problem 1. The ciphertext IPQASEKZYSLA comes from a Vernam encryption with the short keys A and B of length (A) = 2 and l(B) = 3. Furthermore, we also know that the original plaintext starts with SHOW. Reconstruct the long key R. (b) Decipher the message.
Problem 1. The ciphertext IPQASEKZYSLA comes from a Vernam encryption with the short keys A and B of length (A) = 2 and l(B) = 3. Furthermore, we also know that the original plaintext starts with SHOW. Reconstruct the long key R. (b) Decipher the message.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.7: Introduction To Coding Theory (optional)
Problem 12E: Suppose that the check digit is computed as described in Example . Prove that transposition errors...
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![Problem 1. The ciphertext
IPQASEKZYSLA
comes from a Vernam encryption with the short keys A and B of length (A) = 2 and l(B) = 3.
Furthermore, we also know that the original plaintext starts with SHOW.
Reconstruct the long key R.
(a)
(b)
Decipher the message.
As usual, Vernam uses the following letter-to-number conversion table.
ABCDEFGHIJKLMNOPQRS
012 3 45 6 7 8 9 10 11 12 13 14
13 14 15 16 17 18
TUVWX ΥΤΖ
19 20 21 22 23 24 25](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F27adff13-7954-4bd1-a3e1-459b28324214%2Fbff5f4bb-7916-43bd-8c71-39a2aa0240b7%2Fdxlrfyd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Problem 1. The ciphertext
IPQASEKZYSLA
comes from a Vernam encryption with the short keys A and B of length (A) = 2 and l(B) = 3.
Furthermore, we also know that the original plaintext starts with SHOW.
Reconstruct the long key R.
(a)
(b)
Decipher the message.
As usual, Vernam uses the following letter-to-number conversion table.
ABCDEFGHIJKLMNOPQRS
012 3 45 6 7 8 9 10 11 12 13 14
13 14 15 16 17 18
TUVWX ΥΤΖ
19 20 21 22 23 24 25
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