VoIP Security
From: The VoIP Essentials Series
By: Ken Camp
With the dramatic increase in VoIP deployments during 2005, there have been numerous surveys about security concerns. A few major threats to VoIP appear consistently in every survey. Falling prey to a Denial of Service (DoS) attack is most often the greatest fear. Worms and viruses are another major concern. Eavesdropping on calls raises anxieties for many companies deploying VoIP. In addition, VoIP spam gets a lot of mention in the press, but so far hasn’t become a real problem.
VoIP security is a large topic, and the subject of many books and papers. This article provides a simple overview into the primary areas of focus and concern when addressing VoIP security. To keep things focused, we’ll explore threats and dangers in the context of three fundamental security concerns—confidentiality, integrity, and availability. We’ll cover VoIP network threats from the outside and the inside. In addressing how to deal with the threats, we’ll stick to three fundamental precepts—prevention, detection, and reaction.
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