JavaScript Encrypt?

Question

How to hash/encrypt string value in JavaScript? I need a mechanism to do so for hiding some data in localStorage/cookie?

It is something related to security concern but I want some protection for my data.

Answer 1

There are lots of encryption libraries for javascript. Here's the first one that came up on Google: http://crypto.stanford.edu/sjcl/

Your user can always gain access to the key, so this won't protect data from your user. If you want to hide things from the user, you'll have to encrypt it on the server and never send the key to the client.