Week 41: Your PDA/PED policy

When
Review at least once a year.

Why
Personal Digital Assistants (PDAs), part of the larger group of Portable Electronic Devices (PEDs), can potentially impact security in a variety of ways but are often not part of a security policy. Storage capabilities and portability both lead to greater chances of theft and even accidental misuse. For instance, when exchanging contact data, someone could unknowingly beam a Trojan from his PDA to a colleague's or infect the corporate network when synchronizing to a desktop system. Such Trojans wouldn't be analyzed by the corporate firewall, and may not be virus-scanned when synching with the home or corporate network.

Right now, PDA viruses aren't widespread, but these and other mobile devices are likely the next big target of virus writers, so said folks at the Black Hat Briefings in Las Vegas, and I agree -- after all, there's no challenge left to infecting desktop systems. Write and implement a PED policy while you still have time to do it right!

Strategy
Does your organization have a policy for mobile devices? Are you going to allow them, if you even have a choice? If so, are you going to support them? Which models? Does the company have to have bought them? Can they hot-synch wirelessly or only by cable? Some considerations for your PED policy to enforce your systems' confidentiality, integrity of data, availability and accountability:

For organizations protecting sensitive information like R&D data, and some government facilities, PEDs with a radio frequency (RF) wireless capability probably should be prohibited because reliable countermeasures don't exist to mitigate that security risk. Removing the antenna isn't eno

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More information
Department of Defense (DoD) Directive 8100.2, Use of Commercial Wireless Devices, Services, and Technologies in the DoD Global Information Grid (GIG). See also: NIST Interagency Report -- 6981 Policy Expression and Enforcement for Handheld Devices April 2003, a discussion of handling devices in your organization with a proof-of-concept for control using certificates, and SP 800-48 Wireless Network Security, November 2002. Forensics on PEDs are rather specialized, and many examiners like the tools from Paraben.

About the author Shelley Bard, CISSP, CISM, is a senior security network engineer with Verizon Federal Network Systems (FNS). An information security professional for 17 years, Bard has briefed and written infosecurity assessments and technical reports for the White House and Department of Defense, special interest groups, industry and academia. Please e-mail any comments.

Opinions expressed in this column are those of Shelley Bard and don't necessarily reflect those of Verizon FNS.

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