Today's Lecture Overview of Network Security Cryptographic hash functions User authentication SSl IPSec IKE Distributed Denial of Service(DDos * Firewa‖l Reading List 2021/2/3Today’s Lecture  Overview of Network Security  Cryptographic hash functions  User authentication  SSL  IPSec & IKE  Distributed Denial of Service (DDoS)  Firewall  Reading List 2021/2/3 2