I am working at a non-profit health care project which will have an messenger build in. Within the project I wanna add Perfrect Forward secrecy as part of security. As I have read the documentation this is achieved by using the Ephemeral Diffie-Hellman (DHE) or the Ephemeral Elliptic Curve Diffie-Hellman (ECDHE) key exchange mechanism. Correct me If I am wrong.
I'm trying to get an idea of how it works exactly. Unfortunately I can't find much information about how you can implement something like this within Android and mainly Kotlin.
At the moment I am using the following implementation within Stackoverflow which has helped me a lot.
I also saw the term double-ratchet passing by, isn't that a bit the same? Since you can no longer decipher previous messages?
What are the first steps to implement the PFS algorithm if somebody has more information about this I will gladly follow it up? As I am struggeling for days now.
