some initial work and thoughts about encryption

shared/enums.h

@@ -127,23 +127,28 @@ Q_ENUM_NS(Support)
 
 enum class TrustLevel {
     /// The key's trust is not decided.
-    Undecided,
+    undecided,
     /// The key is automatically distrusted (e.g., by the security policy TOAKAFA).
     /// \see SecurityPolicy
-    AutomaticallyDistrusted,
+    automaticallyDistrusted,
     /// The key is manually distrusted (e.g., by clicking a button or \xep{0450, Automatic Trust
     /// Management (ATM)}).
-    ManuallyDistrusted,
+    manuallyDistrusted,
     /// The key is automatically trusted (e.g., by the client for all keys of a bare JID until one
     /// of it is authenticated).
-    AutomaticallyTrusted,
+    automaticallyTrusted,
     /// The key is manually trusted (e.g., by clicking a button).
-    ManuallyTrusted,
+    manuallyTrusted,
     /// The key is authenticated (e.g., by QR code scanning or \xep{0450, Automatic Trust
     /// Management (ATM)}).
-    Authenticated
+    authenticated
 };
 Q_ENUM_NS(TrustLevel)
 
+enum class EncryptionProtocol {
+    omemo
+};
+Q_ENUM_NS(EncryptionProtocol)
+
 }
 #endif // SHARED_ENUMS_H