Signal: The Pqxdh Key Agreement Protocol
Still:• relies on a centralized authentication server• bans third party clients• requires a phone number to create an account despite no longer supporting SMS• marketing "Perfect Forward Secrecy" AKA "Forward Secrecy"[0].I favor Session Private Messenger[1] because it is decentralized and allows third party clients, but Signal enthusiasts warn me that the Session client may, hypothetically, at some future date, integrate a cryptocurrency, as the Signal client already does[2].[0] https://en.wikipedia.org/wiki/Forward_secrecy[1] https://getsession.org[2] https://www.stephendiehl.com/blog/signal.html