On Groundhog Day, the groundhog randomly chooses and sends one of two possible messages: m0 = SIXMOREWEEKSOFWINTER m1 = SPRINGARRIVESINMARCH. To add to the mystery, the groundhog encrypts the message using one of the following methods: shift cipher, Vigenère cipher with key length 4 (using four distinct shifts), one-time pad. For each of the following ciphertexts, determine which encryption methods could have produced that ciphertext, and for each of these possible encryption methods, decrypt the message or explain why it is impossible to decrypt. a. ABCDEFGHIJKLMNOPQRST b. UKZOQTGYGGMUQHYKPVGT c. UQUMPHDVTJYIUJQQCSFL.
On Groundhog Day, the groundhog randomly chooses and sends one of two possible messages: m0 = SIXMOREWEEKSOFWINTER m1 = SPRINGARRIVESINMARCH. To add to the mystery, the groundhog encrypts the message using one of the following methods: shift cipher, Vigenère cipher with key length 4 (using four distinct shifts), one-time pad. For each of the following ciphertexts, determine which encryption methods could have produced that ciphertext, and for each of these possible encryption methods, decrypt the message or explain why it is impossible to decrypt. a. ABCDEFGHIJKLMNOPQRST b. UKZOQTGYGGMUQHYKPVGT c. UQUMPHDVTJYIUJQQCSFL.
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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On Groundhog Day, the groundhog randomly chooses and sends one of two possible messages:
m0 = SIXMOREWEEKSOFWINTER
m1 = SPRINGARRIVESINMARCH.
To add to the mystery, the groundhog encrypts the message using one of the following methods: shift cipher, Vigenère cipher with key length 4 (using four distinct shifts), one-time pad. For each of the following ciphertexts, determine which encryption methods could have produced that ciphertext, and for each of these possible encryption methods, decrypt the message or explain why it is impossible to decrypt.
a. ABCDEFGHIJKLMNOPQRST
b. UKZOQTGYGGMUQHYKPVGT
c. UQUMPHDVTJYIUJQQCSFL.
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