VoIP security: Encryption

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VoIP security
Get more VoIP security best practices with our Voice over IP security learning guide

Voice over IP (VoIP) communications offers businesses numerous benefits over traditional PBX phone systems. However, companies have been slow to warm to the technology because of some early difficulties, specifically VoIP security and encryption. Protecting classified information sent over VoIP is a key milestone in the growth of the VoIP industry. Here are some suggestions and best practices that systems integrators hoping to sell VoIP to their customers should be aware of.


Encrypting VoIP traffic: How and why

Securing Voice over IP (VoIP) traffic remains one of the biggest obstacles to its mainstream enterprise use. As a general rule, VoIP traffic flows across the Internet in unencrypted packets. What this means is that anyone with a protocol logger who happens to be on a network segment between the sender and the recipient can intercept VoIP packets and use those captured packets as a recording of the phone conversation.

VoIP traffic tends to be unencrypted, but that doesn't mean that it has to be. Learn more about VoIP encryption history and techniques, including products such as Zfone.

About the author
Brien M. Posey, MCSE, is a Microsoft Most Valuable Professional for his work with Windows 2000 Server and IIS. Brien has served as CIO for a nationwide chain of hospitals and was once in charge of IT security for Fort Knox. As a freelance technical writer he has written for Microsoft, CNET, ZDNet, TechTarget, MSD2D, Relevant Technologies and other technology companies. You can visit Brien's personal Web site at www.brienposey.com.

This was first published in April 2007

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