A Caesar cipher is a trivial method to obfuscate text by substituting each character with it successor (or nth successor). Use this tag for questions involving a Caesar cipher or toy-grade ciphers of similar design.
A very simple cipher in which the letters of the alphabet are substituted by a different letter that have a fixed distance to the original letter.
Named after Julius Caesar, because he is said to have used it.
A special case of the Caesar cipher where every character is replaced by its 13th successor in the alphabet is known as ROT13.
The vigenere-cipher is a slightly more complex variant of the Caesar cipher.