--- lbbs/Tutorial.md	2025/12/26 02:47:15	1.2
+++ lbbs/Tutorial.md	2025/12/26 06:27:54	1.3
@@ -16,3 +16,4 @@ Introduction of Technical Design
 [Talk 3 --- Optimization for High-concurrent Traversal and Browse of Articles](https://www.bilibili.com/video/BV16mBXByEuA/) [watch on Youtube](https://www.youtube.com/watch?v=0MzrSFdq3fo)  
 [Talk 4 --- Difficulties in Building Text Editor](https://www.bilibili.com/video/BV1fKBXBkESL/) [watch on Youtube](https://www.youtube.com/watch?v=KgaX3auf8pA)  
 [Talk 5 --- Data Structures and Algorithms](https://www.bilibili.com/video/BV1B7BoBQEcD/) [watch on Youtube](https://www.youtube.com/watch?v=fJsAtVQZNv0)  
+[Talk 6 --- Access Control and Data Security](https://www.bilibili.com/video/BV1enBaBkErp/) [watch on Youtube](https://www.youtube.com/watch?v=MuQEQ_6wKu0)