Encryption Methods: ROT13 Cipher Answers 1. What does ROT13 do to the letter 'G' in the encryption process? A. G becomes T B. G becomes N C. G becomes U D. G becomes S Answer: G becomes T (A) In ROT13, each letter is shifted 13 places down the alphabet, so 'G' becomes 'T'. 2. Which of the following best describes the ROT13 cipher? A. A simple substitution cipher that is easily broken B. An encryption method that changes every letter randomly C. A complex substitution cipher requiring a key D. A secure encryption method that resists frequency analysis Answer: A simple substitution cipher that is easily broken (A) ROT13 is known for being a simple substitution cipher that is extremely weak and easily broken. 3. What happens when you apply ROT13 twice to a message? A. The message becomes an encoded version of its reverse B. The message becomes a random string C. The message is encrypted again D. The original message is retrieved Answer: The original message is retrieved (D) Applying ROT13 twice will return the original message, as it is its own inverse. 4. Which character types are affected by ROT13 during the encryption process? A. All printable characters are transformed B. Only numbers and punctuation are modified C. Both uppercase and lowercase letters are shifted D. Only alphabetic characters are affected Answer: Only alphabetic characters are affected (D) ROT13 affects only alphabetic characters; non-alphabetic characters remain unchanged. 5. What is a notable weakness of the ROT13 cipher? A. It is highly resistant to frequency analysis B. It is incredibly complex to understand C. It requires a secure key for encryption D. It can be easily broken with frequency analysis Answer: It can be easily broken with frequency analysis (D) ROT13 is easily broken due to its vulnerability to frequency analysis.