ROT13 Şifresi

ROT13 is a special version of the Caesar cipher that always shifts Latin letters by exactly 13 positions. A becomes N, B becomes O, C becomes P, and so on. After M, the alphabet wraps around back to A.

Because the English alphabet contains 26 letters and 13 is exactly half of that, applying ROT13 twice restores the original message. This means the same operation is used for both encoding and decoding.

ROT13 changes only Latin letters. Numbers, spaces, punctuation marks, and most symbols remain unchanged.

The transformation is easy to visualize because every letter maps to the letter exactly 13 positions away — and the mapping is its own inverse:

For example, HELLO WORLD becomes URYYB JBEYQ. Applying ROT13 again restores the original text.

ROT13 is not considered encryption by modern standards. There is no secret key, and anyone familiar with the method can reverse it instantly.

Its purpose is light obfuscation rather than protection. It is often used to hide spoilers, puzzle answers, jokes, or content that should not be immediately visible without a deliberate action.

ROT13 is effectively a Caesar cipher with a fixed shift of 13. Unlike a normal Caesar cipher, there is no configurable key or shift value.

This simplicity makes ROT13 easy to use and recognize, but also makes it unsuitable for any situation that requires real confidentiality.