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I’m developing a web project using JavaScript with AJAX requests to WebServices and I’m interested in encrypting the information.
How secure is to encrypt from the client side? Remember that I’m not using a server side language.
There was a huge discussion on hackernews about this last week, inspired by this article on matasano.com.
Basically, secure javascript does not exist. The only way is to have everything be over HTTPS, because if you don’t, you expose your user to certain flaws.
But once you have HTTPS, extra encryption via javascript is pointless: everything already is secure.