diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 3e063ac..b02bf7c 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2182,6 +2182,18 @@
 											  l marketing issues
 											  l red tape (bureaucracy)
 				- ## Topic 19
+					- The scope and objectives of cybersecurity
+						- Definition :-> Cybersecurity is the application of technologies,
+						  processes and controls to protect systems,
+						  networks, programs, devices and data from cyber
+						  attacks
+						- Objective :-> It aims to reduce the risk of cyber attacks, and
+						  protect against the unauthorised exploitation of
+						  systems, networks and technologies
+						-
+					- Trends and drivers of cybersecurity
+					- Key concepts
+					- Risk management
 	- LATER 概率论 (隔了一个周末)
 	  collapsed:: true
 	  SCHEDULED: <2023-06-19 Mon>