ROT3

ROT3, also known as Rotate by 3, is a simple letter substitution cipher that is a variant of the Caesar cipher. It is a type of monoalphabetic substitution cipher, where each letter in the plaintext is shifted a certain number of places down the alphabet. In the case of ROT3, each letter is shifted three places to the right. For example, the letter 'A' would be replaced with 'D', 'B' with 'E', and so on. The same principle applies in reverse for decoding. ROT3 is not considered secure for protecting sensitive information, as it can be easily broken with modern computational resources. It is primarily used for simple obfuscation or as a teaching tool in cryptography. The ROT3 cipher can be applied to both uppercase and lowercase letters, and non-alphabetic characters are typically left unchanged. Despite its simplicity, ROT3 has been used in various contexts, including in the programming language Python as a form of simple encoding.