Cryptography is an indispensable tool for protecting information in computer systems. This course explains the inner workings of cryptographic primitives and how to use them correctly.
Administrative
Homeworks and Projects
Due: Wednesday, Jan. 14, 2026, via Gradescope (code="8DE6NR")
Due: Thursday, Jan. 29, 2026, via Gradescope
Assignment: [instructions] [starter code]
Due: Wednesday, Feb. 11, 2026, via Gradescope
Due: Thursday, Feb. 19, 2026, via Gradescope
Assignment: Not out yet.
Due: Tuesday, March 3, 2026, via Gradescope
Due: Wedesnday, March 11, 2026, via Gradescope
Course calendar
Lecture recordings
Video cameras located in the back of the room will capture the instructor presentations in this course. For your convenience, you can access these recordings by logging into the course Canvas site. These recordings might be reused in other Stanford courses, viewed by other Stanford students, faculty, or staff, or used for other education and research purposes. Note that while the cameras are positioned with the intention of recording only the instructor, occasionally a part of your image or voice might be incidentally captured. If you have questions, please contact a member of the teaching team.