Top HP security architect Donald Pipkin recently released the second edition of his book, "Halting the Hacker: A Practical Guide to Computer Security." Pipkin's book looks at threats, tools and responses with a focus on countermeasures to protect HP-UX, Linux or Unix systems.

The man with 15 years of network security experience tells eSecurityPlanet that network and security administrators need to figure out exactly what their data is worth and put that figure in line with how much they're spending on security. He also says he worries about all those stable old networks that were built before security was a major concern, and that users are adding devices and modems to corporate networks under IT's radar.

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