Decode the Secrets: A Medium-Level Cryptography Challenge
Six puzzles test your ability to unravel hidden messages using classic and contemporary techniques.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
Which shift value turns the ciphertext KHOOR back into the original English word?
- 2
In a simple monoalphabetic substitution, if the letter E is encoded as Q, which letter is likely to be encoded as W based on typical frequency order?
- 3
A ciphertext repeats the segment XQZ at positions 12 and 30. What is the most probable length of the Vigenère key?
- 4
Which RSA key length is generally considered the minimum for protecting data against modern attacks?
- 5
If an Enigma machine uses rotors I, II, III from left to right, which rotor steps first during encryption?
- 6
Which hash algorithm is most vulnerable to deliberate collision attacks as demonstrated in 2005?
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