Lecture
This lecture covers various aspects of email security, including statistics on email traffic, filtering techniques, and real-time blackhole lists. It also discusses the challenges faced in securing email systems, such as spam control and the need for effective antispam and antivirus solutions. Additionally, the lecture explores the Cisco Email Security Appliance and its effectiveness in combating malware and phishing attacks. The presentation highlights the importance of authentication for email senders and the control of access to web applications. It also addresses vulnerabilities like Spectre/Meltdown and the migration of antivirus infrastructure to virtual machines.