http://lpoaj76nfopd5lpinbskyqtroppamrzhhay3g4vvjm75st6ger34lbyd.onion/posts/2024/03/news.html
SimpleX post-quantum cryptography SimpleX optionally supports post-quantum key exchanges since version 5.6 . They appear to believe that, the way they are doing it, it is more secure than Signal's implementation , as (according to their claims, unlike Signal) their implementation does not break the double ratchet's self-healing properties.