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The following ciphertext message was encrypted using the RSA algorithm and public key (2021,97).

The following ciphertext message was encrypted using the RSA algorithm and public key (2021,97).

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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### Cryptography Exercise 1. **Affine Cipher Decryption Task** - An intercepted encrypted message reveals through frequency analysis that 'R' is the most common letter and 'X' is the least in the ciphertext. - **Ciphertext**: SMRER TL CJ LQJJC - Task: Use the frequency analysis information and the affine cipher method to decrypt the message. 2. **Vigenère Cipher Decryption Task** - **Ciphertext**: MS. RZ MS QWC. KKMAI LA WS WZH. - **Keyword**: JEDI - Task: Determine the plaintext message using the Vigenère cipher and the given keyword. 3. **RSA Decryption Task** - **Ciphertext**: 1259 0854 1647 1139 - **Public Key**: (2021,97) - Task: Decrypt the message using the RSA algorithm and the provided public key. 4. **ElGamal Encryption Task** - Using the ElGamal cryptosystem, create and encrypt a message that is at least eight alphabetic characters long. - **Block Requirement**: Convert the plaintext into two-digit blocks. - **Public Key**: (89,14,8) - Task: Use a unique ephemeral key (j) to encrypt each block. 5. **Vernam Cipher and Baudot Code Task** - **Ciphertext Lines**: - 01011 11010 00110 10110 00101 01100 10101 10011 01111 10011 - 00001 01101 10110 00001 11000 01000 00000 01101 10101 10011 - Task: Determine the plaintext message using the first line of Chapter 2 in the textbook as the key. 6. **Additional Task** - **Ciphertext Specified**: Implicit from the context, potentially one of the above tasks requires further deciphering. ### Explanation of Graphs or Diagrams There are no graphs or diagrams in the provided tasks. Each task focuses purely on textual cryptographic challenges.
Transcribed Image Text:### Cryptography Exercise 1. **Affine Cipher Decryption Task** - An intercepted encrypted message reveals through frequency analysis that 'R' is the most common letter and 'X' is the least in the ciphertext. - **Ciphertext**: SMRER TL CJ LQJJC - Task: Use the frequency analysis information and the affine cipher method to decrypt the message. 2. **Vigenère Cipher Decryption Task** - **Ciphertext**: MS. RZ MS QWC. KKMAI LA WS WZH. - **Keyword**: JEDI - Task: Determine the plaintext message using the Vigenère cipher and the given keyword. 3. **RSA Decryption Task** - **Ciphertext**: 1259 0854 1647 1139 - **Public Key**: (2021,97) - Task: Decrypt the message using the RSA algorithm and the provided public key. 4. **ElGamal Encryption Task** - Using the ElGamal cryptosystem, create and encrypt a message that is at least eight alphabetic characters long. - **Block Requirement**: Convert the plaintext into two-digit blocks. - **Public Key**: (89,14,8) - Task: Use a unique ephemeral key (j) to encrypt each block. 5. **Vernam Cipher and Baudot Code Task** - **Ciphertext Lines**: - 01011 11010 00110 10110 00101 01100 10101 10011 01111 10011 - 00001 01101 10110 00001 11000 01000 00000 01101 10101 10011 - Task: Determine the plaintext message using the first line of Chapter 2 in the textbook as the key. 6. **Additional Task** - **Ciphertext Specified**: Implicit from the context, potentially one of the above tasks requires further deciphering. ### Explanation of Graphs or Diagrams There are no graphs or diagrams in the provided tasks. Each task focuses purely on textual cryptographic challenges.
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