Caesar cipher
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Caesar cipher
A very simple method of encryption, the Caesar cipher - also known as a shift cipher - 'shifts' the alphabet a certain number of spaces, pushing the letters at the end to the beginning.
The most common Caesar cipher is Rot 13, where
A
becomes
N
and so forth. You can optionally add a key to the cipher to further encrypt your results, this will create a custom alphabet to rotate through –
see the Substitution Cipher below for more information.
There is more information available on the Caesar_cipher Wikipedia page.