In the computer industry, Internet security refers to techniques for ensuring that data stored in a computer cannot be read or compromised by any individuals without authorization. Most security measures involve data encryption and passwords. Data encryption is the translation of data into a form that is unintelligible without a deciphering mechanism. A password is a secret word or phrase that gives a user access to a particular program or system. Internet security professionals should be fluent in the four major aspects: Penetration testing Intrusion Detection Incidence Response Legal / Audit Compliance Contents 1 Routers 2 Firewalls 3 Anti-virus 4 Anti-spyware 5 Browser choice 6