The Substitution Cipher

#cipher#substitution#crypto#hard#frequency-analysis

Cryptogram

Can you figure this one out?

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In a simple substitution cipher, each letter is replaced by a fixed different letter. Below is an encoded message. The most common letter in English is E, the second most common is T, and 'XYZ' is a single-letter word. XYZ DTQUV HQZWR GZS OVQJ XYZ LAZZ

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Caesar Cipher: Decode the Message

Julius Caesar used a simple cipher to protect his messages: he shifted each letter forward by 3 positions (A→D, B→E, ... Z→C). Decode this message: ZKHUH WKHUH LV D ZLOO WKHUH LV D ZDB

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ROT13: The Classic Internet Cipher

ROT13 rotates each letter by 13 positions. Because the alphabet has 26 letters, applying ROT13 twice returns the original message — it is its own inverse! Decode this message: GUR NAFJRE VF SBHEGRRA

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Morse Code Message

Samuel Morse invented a code using dots (.) and dashes (-) to represent letters. Decode this Morse code message: -- -.-- ... . -.-. .-. . - .. ... ... .- ..-. .

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