CHAPTER 41
ANTIVIRUS TECHNOLOGY
Chey Cobb and Allysa Myers
41.3.1 Early Days of AV Scanners
41.3.4 Antivirus Engines and Antivirus Databases
41.4.4 Intrusion Detection and Prevention
41.5.1 How Content Filters Work
41.5.2 Efficiency and Efficacy
41.1 INTRODUCTION.
For over two decades, computer viruses have been a persistent, annoying, and costly threat, and there is no end in sight to the problem. There are many vendors offering to provide a cure for viruses and malware, but the mere existence of these software pests is understandably vexing to those charged with system security.
Initially, most viruses were not designed to cause harm but were created more to gain notoriety for the creator or as a prank. Because these early viruses were designed to subvert legitimate program operations across multiple systems, they were more likely to cause unexpected problems. These viruses, and later some Trojans, often damaged data and caused system downtime. The cleanup required to recover from even a minor virus infection was expensive in ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access