title: Deliver encrypted data and decrypt it client side
body: <p>I'm working on a project with some sensitive data. I'm trying to do statistics about Facebook conversation with a client only website. Until now, I have a big JSON file of a Facebook conversation that I parse and do stuff with data. I want to be able to deliver this file only to my friends. So, what I thought is that I locally encrypt it (with I don't know yet which algo), deliver the encrypted file and give the password to my friend so only them can decrypt it. Do you think it will work and it will be secure enought ? I don't want someone to be able to bruteforce it or whatever, as it is private conversation. And do you have any recommendation about the algo I should use ?</p>