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The Caesar cipher is a substitution cipher in which the letters of an ordered alphabet are cyclically shifted by a given number. A detailed description can be found e.g. here. Let u be the index o...
#1: Initial revision
by
Holden
·
2022-03-08T19:29:54Z (almost 3 years ago)
How can the Caesar cipher be implemented in Java?
The Caesar cipher is a substitution cipher in which the letters of an ordered alphabet are cyclically shifted by a given number. A detailed description can be found e.g. [here][1]. Let `u` be the index of the letter to be encrypted in the alphabet, `shift` the shift and `size` the number of letters of the alphabet, then the following applies to the index `v` of the encrypted letter: ```none v = mod(u + shift, size) ``` and for decryption: ```none u = mod(v - shift, size) ``` How can this algorithm be implemented in Java? [1]: https://en.wikipedia.org/wiki/Caesar_cipher