Update 'README.md'

README.md

@@ -21,6 +21,10 @@ libchat6 is a complete library that handles an IPv6 only, peer-to-peer, end-to-e
 * Each client will randomly add a certain amount of time to its own metric to avoid disclosing its identifiy to any incoming connection.
 * ... ?
 
+## notes
+* replace RSA by Ed25519
+* use TAI64 for timestamps
+
 ## Protocol
 
 ```