More details about p2p encryption

doc/overview.md

@@ -14,7 +14,15 @@ Equihash (200,9) (ASIC)
 
 ## P2P
 
-TLS1.3 via WolfSSL is enforced for all network connections as of v3.6.1
+TLS1.3 via WolfSSL is enforced for all network connections as of v3.6.1 .
+Many ciphersuites are technically supported by TLS1.3 but many of them
+are ancient, proved to be less secure than intended or likely backdoored.
+
+Hush P2P connections are randomly choosen between these two ciphersuites each
+time a new connection to a peer is created:
+
+  * `TLS_AES_256_GCM_SHA384`
+  * `TLS_CHACHA20_POLY1305_SHA256`
 
 ## RPC