Hurd said he worries about mobile users who leave the network and open up their machines to files that could contain malicious payloads such as viruses, worms and Trojan horses, and then infect the network when they log back on. The company is going to use technology similar to NetworkAccessQuarantineControl to ensure that connecting devices are scanned for viruses and have the latest software updates.

"It seems like we've got to protect ourselves from our own users rather than someone else," Hurd said.