After the arrest of Pavel Durov, I wanted to move from Telegram to something end-to-end encrypted. I know Signal is pretty good, but I think it is better to have our messages in my own server.
I have already looked in XMPP, but it required SSL certs and I did not have the mood to configure them.
Do you know any other selfhosted messaging service for a group of 4-5 friends, or an easy way to configure an XMPP server? Or shall I use Signal after all (I don't really care that much about being selfhosted, I just thought it would be more privacy friendly)?
UPDATE: I managed to set up an XMPP server using prosody with the SSL certs. We have been testing it with my friend and it seems to go well.
Oh, I missed the L1 in the title. Basically, all the decryption at L1 is happening inside a Trusted Execution Environment. This is a dedicated chip that does all encryption-decryption (among other things). This is why it is so difficult to extract the keys, because they don't enter the CPU or are stored in RAM, because the dedicated chip handles all of these.
So I don't think you can find a guide about this, because if anyone has found even one exploit, they would be keeping it to ourselves, so that it doesn't get patched.
Although it is very difficult, I think the only real solution is to reverse engineer a TEE and find an exploit yourself.
If you manage to do this, please let me know! I am happy to get updates about progress in this topic.