Arch-rival McAfee is also out on the DLP battlefield, having at the end of last year and now has about 500 DLP corporate customers, according to Mike Siegel, McAfee’s senior director of product management.

McAfee’s Host Data Loss Prevention and Network DLP Prevent and Monitor all work with McAfee’s flagship ePolicy orchestrator console, and the host DLP is integrated with McAfee's SafeBoot encryption software to invoke encryption of sensitive data.

McAfee’s host DLP software can be used alone or as an add-on to the flagship endpoint anti-malware security software that's part of McAfee's Total Protection for Data Endpoint suite. But there's still much more to be done, Siegel says.

McAfee is looking at taking the DLP engine and adding it to its Web gateway, e-mail gateway, firewall and intrusion-protection gear, something likely to occur next year, Siegel says.

The DLP battle for the enterprise is under way.