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