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2. The following ciphertext message was encrypted using Vigenére Cipher cipher with keyword JEDI. MS. RZ MS QWC. XKMAI LA WS WZH. Determine the plaintext message.

2. The following ciphertext message was encrypted using Vigenére Cipher cipher with keyword JEDI. MS. RZ MS QWC. XKMAI LA WS WZH. Determine the plaintext message.

Database System Concepts
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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**Educational Decryption Exercises** 1. **Affine Cipher Decryption:** A lengthy encrypted message was intercepted. Frequency analysis indicates that 'R' is the most frequent and 'X' the least frequent letter in the ciphertext. Use this to decrypt the excerpt below, assuming an affine cipher was used: ``` Ciphertext: SMRER TL CJ LQJJC ``` 2. **Vigenère Cipher Decryption:** The ciphertext encrypted with the keyword "JEDI" is as follows: ``` Ciphertext: MS. RZ MS QWC. KKMAI LA WS WZH. ``` - Determine the plaintext message. 3. **RSA Encryption Decryption:** Using the RSA algorithm and the public key (2021, 97), decrypt the following message: ``` Ciphertext: 1259 0854 1647 1139 ``` - Determine the plaintext message. 4. **ElGamal Cryptosystem Encryption:** Create and encrypt a message using the ElGamal cryptosystem. The plaintext must be a recognizable word or phrase, at least eight characters long. The plaintext is divided into two-digit blocks. Use a unique ephemeral key (j) for encryption and the public key (89,14,8). 5. **Verman Cipher and Baudot Code Decryption:** Given two lines of ciphertext created using a Verman cipher and Baudot code: ``` 01011 11010 00110 10110 01000 01100 10101 10011 01111 10011 00001 01101 10110 00001 11000 01000 00000 01101 10101 10011 ``` - Using the first line of Chapter 2 in your textbook as the key, determine the plaintext message. 6. **Complete Decryption:** - Complete all decryption steps as required.
Transcribed Image Text:**Educational Decryption Exercises** 1. **Affine Cipher Decryption:** A lengthy encrypted message was intercepted. Frequency analysis indicates that 'R' is the most frequent and 'X' the least frequent letter in the ciphertext. Use this to decrypt the excerpt below, assuming an affine cipher was used: ``` Ciphertext: SMRER TL CJ LQJJC ``` 2. **Vigenère Cipher Decryption:** The ciphertext encrypted with the keyword "JEDI" is as follows: ``` Ciphertext: MS. RZ MS QWC. KKMAI LA WS WZH. ``` - Determine the plaintext message. 3. **RSA Encryption Decryption:** Using the RSA algorithm and the public key (2021, 97), decrypt the following message: ``` Ciphertext: 1259 0854 1647 1139 ``` - Determine the plaintext message. 4. **ElGamal Cryptosystem Encryption:** Create and encrypt a message using the ElGamal cryptosystem. The plaintext must be a recognizable word or phrase, at least eight characters long. The plaintext is divided into two-digit blocks. Use a unique ephemeral key (j) for encryption and the public key (89,14,8). 5. **Verman Cipher and Baudot Code Decryption:** Given two lines of ciphertext created using a Verman cipher and Baudot code: ``` 01011 11010 00110 10110 01000 01100 10101 10011 01111 10011 00001 01101 10110 00001 11000 01000 00000 01101 10101 10011 ``` - Using the first line of Chapter 2 in your textbook as the key, determine the plaintext message. 6. **Complete Decryption:** - Complete all decryption steps as required.
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