diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 2444d55..b7d34ec 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -2192,8 +2192,14 @@
 						  systems, networks and technologies
 					- Trends and drivers of cybersecurity
 						- Information Security
-							- Definition: Seeks to protect all information assets, whether in
+							- Definition :-> Seeks to protect all information assets, whether in
 							  hard copy or in digital form
+							- Concepts: #flashcard
+								- confidentiality
+									- Confidentiality means that only people with the right
+									  permission can access and use information
+								- integrity, and
+								- availability of information
 						- Privacy and Data Protection
 						  collapsed:: true
 							- Data privacy are the regulations, or policies, that