Network security professionals are besieged by a nonstop flood of new software vulnerabilities, easy-to-get hacker toolkits, and an army of technology criminals eager to exploit network weaknesses for fun or profit. And despite defensive efforts with firewalls, intrusion detection, antivirus and the like, criminals, careless employees and contractors have exposed more than 158 million digital records of consumers’ personally identifiable information since 2005. This security guide describes the threat and the measures you can put in place using QualysGuard, an on demand software-as-a-service (SaaS) solution for effective vulnerability management and policy compliance.