Cryptography

AY2025/2026 Semester 1

This course will introduce cryptography and cryptanalysis. Cryptography is applied to protect data confidentiality and to authenticate data. Cryptanalysis is to analyze the security of cryptosystems. The course will cover five types of cryptosystems: symmetric key encryption, symmetric key authentication (message authentication code), hash function, public key encryption and public key authentication (digital signature). The applications of cryptography will be covered, especially the TLS which is widely used to protect the Internet traffic.