We have all become accustomed to using computers for e-mail, writing, financial modeling, and data storage, as well as retrieving many types of data both at home and at work. These computers are typically connected to company networks and the Internet, normally 24 hours a day, 365 days a year. These same computers and networks, though designed to be accessible, were not necessarily designed to be secure in other words, data security was not a primary focus during their development.

Unfortunately, the security of online computing resources has been an issue since the early days of computer networks. It didn't take long before the first computer worm appeared, and from that day forward, computers, and the networks they run, have needed protection against viruses, Trojan horses, and worms, whether automated or driven by unscrupulous users.

This struggle between companies/users and malicious coders raises many concerns, such as:

• Who is using your computer?

• How secure is your data?

• Are your corporate marketing plans or customers' credit card numbers being copied across an unsecured network by a computer worm, or via a backdoor Trojan while you work?

• Is Greyware (such as Spyware or Adware) infiltrating your corporate users' computers via spam and causing the leakage of information by way of surfing and purchasing habits?

Many of these threats can be delivered by malicious code via corporate e-mail systems, public networks, Web sites, or shared corporate network resources. They can use either known or unpublished software vulnerabilities to exploit badly designed software, all...