About Caesar Cipher
Caesar cipher is one of the single transliteration ciphers that encrypts by replacing the characters in the text with other characters.
Character replacement is performed by shifting the characters from "A" to "Z" to the left or right among the 26 characters of "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
For example, when shifting 3 characters to the left, "A" is encrypted to "D" and "Z" is encrypted to "C".
Plain : ABCDEFGHIJKLMNOPQRSTUVWXYZ
Plain text : THIS IS A SECRET MESSAGE
Cipher text: WKLV LV D VHFUHW PHVVDJH
The number of shifts is the key to encryption.
Only letters are encrypted, not numbers or symbols.
If the number of shifts is 13, the result is the same as ROT13.