Yes I known, jCryption (http://www.jcryption.org/) is a discontinued project ...
but I needed it, so why not write a plugin for Burp Suite (https://portswigger.net/burp/)
using my preferred language, Java (it's a joke, it's a trap) :D
Refer to FEATURES.md for some details. It's not completed because i'm too lazy.
One day I will end it, not today because it is Saturday :D
Refer to BUILD.md for instructions on how to build it from source.
If you want to test it (please skip the Active Scan or I think the domain owner will be unhappy)
you can use the following URL
http://www.jcryption.org/#examples
Else if you want do it "at home" you can use that:
https://github.com/matrix/JCryptionAjaxExample
It's my first Burp Suite plugin, happy hacking ;)