About Caesar Cipher
- ROT13 (shift 13) is a special case where encoding and decoding use the same operation
- Caesar cipher traditionally uses shift 3, named after Julius Caesar
- This is a substitution cipher - each letter is replaced by another letter
- Very weak encryption - easily broken with frequency analysis
- Use for obfuscation only, never for actual security
Examples
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Frequently Asked Questions
Common questions about the ROT13 Cipher
ROT13 (Rotate by 13) is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. Since the alphabet has 26 letters, applying ROT13 twice returns the original text. A becomes N, B becomes O, and so on. Numbers and special characters remain unchanged.
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