Information Assurance

2.3. Protection and Prevention

In this section, we consider security mechanisms for protection against and prevention of security attacks. We consider firewalls and perimeter security in Section 2.3.1 and cryptographic protocols in Section 2.3.2. The interested reader is referred to Northcutt et al. [7] and Cheswick et al. [8] for more details on firewalls. A good reference that considers cryptography and cryptographic protocols is Stinson [9].

2.3.1. Firewalls and Perimeter Security

To block malicious packets from entering a network, it is common to employ firewalls. Firewalls in olden days referred to thick walls of brick constructed especially for preventing the spread of fires from one building to another. Firewalls today refer to hardware, ...