As mentioned, I will be traveling for the whole week next week. Prof. Antonio Bianchi will give a guest lecture on Android security model (e.g., Permission model) on Mon. Please be there and have fun. You could find more fun if you apply the things we have learned so far (e.g., Reference monitor concept) to Android security.
For the class on Wed, there is no need to show up in the class. Instead, please watch an awesome talk from Uncle Ahmad on TEE. Assignment 3 will be some TEE hands-on involving both Intel SGX and ARM TrustZone. Happy weekend~