Signal: The Pqxdh Key Agreement Protocol
Still:<p>• relies on a centralized authentication server<p>• bans third party clients<p>• requires a phone number to create an account despite no longer supporting SMS<p>• marketing &quot;Perfect Forward Secrecy&quot; AKA &quot;Forward Secrecy&quot;[0].<p>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].<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Forward_secrecy" rel="nofollow noreferrer">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Forward_secrecy</a><p>[1] <a href="https:&#x2F;&#x2F;getsession.org" rel="nofollow noreferrer">https:&#x2F;&#x2F;getsession.org</a><p>[2] <a href="https:&#x2F;&#x2F;www.stephendiehl.com&#x2F;blog&#x2F;signal.html" rel="nofollow noreferrer">https:&#x2F;&#x2F;www.stephendiehl.com&#x2F;blog&#x2F;signal.html</a>