I’ve been looking into Briar messenger app but it doesn’t seem to have much documentation.
Being a decentralized app, they say that communication between devices can be done over a wifi lan, bluetooth or over Tor/Internet.
But I still don’t understand how devices find each other.
Just tried it with my brother. Briar generates a random URL-like string such as “briar://7f2g83f7832hgb87f3b…” on your device which you share with the person you want to be in contact with, and they send you their string. Once you’ve both pasted each other’s strings in the proper form field it connects and you can start messaging each other.
that “random” string is in fact the Tor hidden service address.