Cryptography Tool
Encode and decode messages using classic ciphers
Caesar Cipher Settings
Number of positions to shift each letter (e.g., 3 = A→D, B→E)
Enter Your Message
Letters will be processed; numbers and special characters remain unchanged
Result
Encoded Text:
About Cryptography Ciphers
Caesar Cipher
Named after Julius Caesar, who used it for military communications. Each letter is shifted by a fixed number of positions in the alphabet.
Example: With shift 3, "HELLO" becomes "KHOOR" (H→K, E→H, L→O, L→O, O→R)
History: One of the oldest and simplest encryption techniques, dating back to 100 BC.
Substitution Cipher
Each letter in the alphabet is mapped to another letter according to a substitution key. More secure than Caesar cipher.
Example: With key "QWERTYUIOPASDFGHJKLZXCVBNM", "HELLO" becomes "ITSSG"
Variations: Includes famous ciphers like the Pigpen cipher and various military codes.
Security Warning
- These classical ciphers are NOT SECURE by modern standards
- They can be easily broken using frequency analysis and computational methods
- Use only for educational purposes and learning cryptography concepts
- For real encryption needs, use modern algorithms like AES, RSA, or established libraries
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