The disclosure earlier this year of attacks originating in China and targeting Google and other large corporations proves that today's cybercriminals are sophisticated and out for financial gain, not bragging rights. These targeted, multipronged intrusions draw on a range of techniques and tools, including exploitable vulnerabilities, inside information, and attackers' sheer persistence. Could your systems stand up to these sophisticated threats? For many enterprises, the best way to find out is to attack yourself first, or hire somebody to do so. A good penetration test may spot security vulnerabilities before attackers do.