diff --git a/scripts/base/protocols/ssl/main.bro b/scripts/base/protocols/ssl/main.bro
index f1315f8c85..61e6e438db 100644
--- a/scripts/base/protocols/ssl/main.bro
+++ b/scripts/base/protocols/ssl/main.bro
@@ -12,7 +12,7 @@ export {
 		## Time when the SSL connection was first detected.
 		ts:               time             &log;
 		## Unique ID for the connection.
-		uid:         string          &log;
+		uid:              string           &log;
 		## The connection's 4-tuple of endpoint addresses/ports.
 		id:               conn_id          &log;
 		## SSL/TLS version that the server offered.
@@ -25,7 +25,20 @@ export {
 		## indicates the server name that the client was requesting.
 		server_name:      string           &log &optional;
 		## Session ID offered by the client for session resumption.
-		session_id:       string           &log &optional;
+		## Not used for logging.
+		session_id:       string           &optional;
+		## Flag to indicate if the session was resumed and re-used
+		## the key material exchanged in an earlier connection.
+		resumed:          bool             &log &default=F;
+		## Flag to indicate if we saw a non-empty session ticket being
+		## sent by the client using an empty session ID. This value
+		## is used to determine if a session is being resumed and is
+		## not logged
+		client_ticket_empty_session_seen: bool &default=F;
+		## Flag to indicate if we saw a client key exchange message sent
+		## by the client. This value is used to determine if a session
+		## is being resumed and is not logged.
+		client_key_exchange_seen: bool     &default=F;
 		## Last alert that was seen during the connection.
 		last_alert:       string           &log &optional;
 
@@ -36,11 +49,11 @@ export {
 
 		## Flag to indicate if this ssl session has been established
 		## succesfully, or if it was aborted during the handshake.
-		established:  bool &log &default=F;
+		established:      bool             &log &default=F;
 
 		## Flag to indicate if this record already has been logged, to
 		## prevent duplicates.
-		logged:  bool  &default=F;
+		logged:           bool             &default=F;
 	};
 
 	## The default root CA bundle.  By default, the mozilla-ca-list.bro
@@ -149,8 +162,11 @@ event ssl_client_hello(c: connection, version: count, possible_ts: time, client_
 	set_session(c);
 
 	# Save the session_id if there is one set.
-	if ( session_id != /^\x00{32}$/ )
+	if ( |session_id| > 0 && session_id != /^\x00{32}$/ )
+		{
 		c$ssl$session_id = bytestring_to_hexstr(session_id);
+		c$ssl$client_ticket_empty_session_seen = F;
+		}
 	}
 
 event ssl_server_hello(c: connection, version: count, possible_ts: time, server_random: string, session_id: string, cipher: count, comp_method: count) &priority=5
@@ -159,6 +175,9 @@ event ssl_server_hello(c: connection, version: count, possible_ts: time, server_
 
 	c$ssl$version = version_strings[version];
 	c$ssl$cipher = cipher_desc[cipher];
+
+	if ( c$ssl?$session_id && c$ssl$session_id == bytestring_to_hexstr(session_id) )
+		c$ssl$resumed = T;
 	}
 
 event ssl_server_curve(c: connection, curve: count) &priority=5
@@ -180,6 +199,34 @@ event ssl_extension_server_name(c: connection, is_orig: bool, names: string_vec)
 		}
 	}
 
+event ssl_handshake_message(c: connection, is_orig: bool, msg_type: count, length: count) &priority=5
+	{
+	set_session(c);
+
+	if ( is_orig && msg_type == SSL::CLIENT_KEY_EXCHANGE )
+		c$ssl$client_key_exchange_seen = T;
+	}
+
+# extension event is fired _before_ the respective client or server hello.
+# Important for client_ticket_empty_session_seen
+event ssl_extension(c: connection, is_orig: bool, code: count, val: string) &priority=5
+	{
+	set_session(c);
+
+	if ( is_orig && SSL::extensions[code] == "SessionTicket TLS" && |val| > 0 )
+		# in this case, we might have an empty ID. Set back to F in client_hello event
+		# if it is not empty after all
+		c$ssl$client_ticket_empty_session_seen = T;
+	}
+
+event ssl_change_cipher_spec(c: connection, is_orig: bool) &priority=5
+	{
+	set_session(c);
+
+	if ( is_orig && c$ssl$client_ticket_empty_session_seen && !c$ssl$client_key_exchange_seen )
+		c$ssl$resumed = T;
+	}
+
 event ssl_alert(c: connection, is_orig: bool, level: count, desc: count) &priority=5
 	{
 	set_session(c);