Basic Purpose of a Firewall Basically, a firewall does three things to protect your network: • It blocks incoming data that might contain a hacker attack. A few security … The CNS Pdf Notes book starts with the topics covering Information Transferring, Interruption, Interception, Services and Mechanisms, Network Security Model, Security… We protect you from attacks that antivirus can’t block To stay safe from spyware, use one of the popular an-ti-spyware products available online. Goals of Information Security … Cyber security, also referred to as information technology security, focuses on protecting computers, networks, programs and data from unintended or unauthorized access, change or … This is called Network … (STALLINGS) ''Cryptography and Network Security: Principles and Practices'', Sixth Edition, by William Stallings (HANDBOOK) ''Handbook of Applied Cryptography'', Fifth Printing, by Alfred J. Menezes, Paul C. van Oorschot, and Scott A. Vanstone, CRC Press (HARDSEC) ''Hardware Security … • Network Security – measures to protect data during their transmission • Internet Security – measures to protect data during their transmission over a collection of interconnected networks . CSB - Security 101: cover your basics in less than 1 hour 10. Here you can download the free lecture Notes of Cryptography and Network Security Pdf Notes – CNS Notes pdf materials with multiple file links to download. your security. Lesson 1 www.heimdalsecurity.com Online criminals hate us. • It hides information about the net-work by making it seem that all outgoing traffic originates from the firewall rather than the network.