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Crypto

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  • Which Roman leader is credited with inventing a simple substitution cipher that bears his name?
    Julius Caesar
  • A cipher that coordinates and a Polybius square to encode messages
    ADFGX Cipher
  • What does ROT-13 do to a letter?
    Shifts it by 13 positions
  • Decode the Cipher! Ciphertext: ZGZHG Hint: Use the Atbash Cipher (A ↔ Z, B ↔ Y, C ↔ X, etc.)
    ATTACK
  • The Playfair Cipher encrypts one letter at a time. True/False?
    False (It encrypts two letters at a time)
  • Decode the Cipher! Ciphertext: WKH FDW Hint: Use the Caesar Cipher with a backward shift of 3 letters
    THE CAT
  • Which cipher replaces each letter with another letter from a reversed alphabet?
    Atbash Cipher
  • Which cipher hides a message in seemingly innocent text, using the first letters of each word?
    Null Cipher
  • The Vigenère Cipher is more secure than Caesar because it uses a repeating keyword. True/False?
    True
  • The Rail Fence Cipher is a type of transposition cipher. True/False?
    True
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