A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules

Access control is a security technique that regulates who or what can view or use resources in a computing environment

Authentication is a term that refers to the process of proving that some fact or some document is genuine. In computer science, this term is typically associated with proving a user's identity.

What is computer security? What is the history of computer security? Where does computer security come from? Why do we need computer security?

Security is about the protection of assets, computer security deal with the protection of IT assets.

Introduce the contributors for this series of notes

Summarise the abbreviations used in this course.