For legal reasons, only simple encryption can be discussed. One sample simple encryption code was given in reply to one of your previous questions.
It is unfortunately not legally allowed for us to discuss AES, or 3DES, or RSA, or anything based upon elliptic curves, or any form of advanced mathematics.
It is legal for us to discuss Caesar Cypher, such as ROT1 (the code you have already been given) or ROT13 (which is not useful for binary data.)
It is almost (but not quite) the case that any encryption that can be legally discussed is something that you should be able to easily implement yourself after researching the algorithm.
Reminder: MATLAB Answers is for answering questions about MATLAB, not for answering questions about theory or algorithms, and it is not for giving people code. When you have found an algorithm and you are getting an error in implementing it, you can ask about the errors. Or you can ask about MATLAB language features such as array manipulation or object oriented programming or parallel programming. But encryption is not a MATLAB feature, so you need to research an encryption algorithm and start implementing it.
