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1. You are using a Vigenère cipher to communicate with someone. (a) Suppose the encryption key is (10,4,24). Encrypt the following plaintext: MATHE- MATICS (b) Suppose the encryption key is SEA. Decrypt the following ciphertext: STPDIPAI (c) Suppose the plaintext is "I LOVE CANADA" and the ciphertext is "ULHCQCTUMDT". Find the encryption key. (You can express the key as a word or vector.)

1. You are using a Vigenère cipher to communicate with someone. (a) Suppose the encryption key is (10,4,24). Encrypt the following plaintext: MATHE- MATICS (b) Suppose the encryption key is SEA. Decrypt the following ciphertext: STPDIPAI (c) Suppose the plaintext is "I LOVE CANADA" and the ciphertext is "ULHCQCTUMDT". Find the encryption key. (You can express the key as a word or vector.)

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1. You are using a Vigenère cipher to communicate with someone. (a) Suppose the encryption key is (10,4,24). Encrypt the following plaintext: MATHE- MATICS (b) Suppose the encryption key is SEA. Decrypt the following ciphertext: STPDIPAI (c) Suppose the plaintext is "I LOVE CANADA" and the ciphertext is "ULHCQCTUMDT". Find the encryption key. (You can express the key as a word or vector.)
Transcribed Image Text:1. You are using a Vigenère cipher to communicate with someone. (a) Suppose the encryption key is (10,4,24). Encrypt the following plaintext: MATHE- MATICS (b) Suppose the encryption key is SEA. Decrypt the following ciphertext: STPDIPAI (c) Suppose the plaintext is "I LOVE CANADA" and the ciphertext is "ULHCQCTUMDT". Find the encryption key. (You can express the key as a word or vector.)
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