CS 127 / 227 / CSCI-E207: Cryptography

syllabus - FAQ - schedule - piazza - canvas - gradescope - lectures


Cryptography is as old as human communication itself, but has undergone a revolution in the last few decades. It is now about much more than “secret writing” and includes seemingly paradoxical notions such as communicating securely without a shared secret, and computing on encrypted data. In this challenging but rewarding course we will start from the basics of private and public key cryptography and go all the way up to advanced notions such as fully homomorphic encryption and indistinguishability obfuscation.

Mathematical background: This is a proof-based course that will be best appreciated by mathematically mature students, see the FAQ. I highly recommend you go over my CS 121 lectures on mathematical background and probability before the course starts. I will also publish about a week before the first lecture a homework zero that students are highly encouraged to complete before the course begins.

The graduate version of this course, CS-227, will involve an extra project.

This course has lecture notes but no official textbook. However, the following books can be helpful: