I'm developing an ASP.NET MVC application in which I want to encrypt a short string on the server, using C#, and send it to the client-side.

Then on the client-side it will be decrypted through Javascript code.

Any thoughts on how to implement this?

Do you know of a simple encryption algorithm (doesn't have to be bullet-proof secure) that can be easily translated from C# to Javascript or vice-versa?

NOTE: I could do this entirely in C# and do the decryption through Ajax, but I'd prefer not to do it this way, as I want to reduce website traffic as much as possible.