ROT-13 / Caesar Cipher

Encode and decode text using ROT-13 and Caesar cipher methods

ROT-13 / Caesar Cipher
Simple text encoding and decoding using classical cipher methods
ROT-13

ROT-13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet.

Features:

  • • Fixed shift of 13 positions
  • • Self-inverse (encoding = decoding)
  • • Only affects letters (A-Z, a-z)
  • • Preserves case and non-letters
A→N, B→O, C→P, ..., N→A, O→B, P→C
Caesar Cipher

The Caesar cipher shifts each letter by a fixed number of positions in the alphabet. Named after Julius Caesar.

Features:

  • • Customizable shift amount (1-25)
  • • Separate encode/decode modes
  • • Historical significance
  • • Easy to break with frequency analysis
Shift 3: A→D, B→E, C→F, ..., X→A, Y→B, Z→C
Security Note

⚠️ Educational Purpose Only

These ciphers are extremely weak by modern standards and should never be used for actual security purposes. They are easily broken and are only suitable for educational demonstrations or simple obfuscation.