CNET reports on the goings on at the Black Hat conference.  Yesterday tools to test the security of VoIP were discussed, and handed out.  Read about the kinds of vulnerabilities VoIP has, before you go out and switch.
“Researchers at the Black Hat security conference here released the tools on Wednesday. The programs are meant to test the security of increasingly popular voice over Internet Protocol telephony systems, Dave Endler, director of security research at TippingPoint, said in an interview. TippingPoint is part of 3Com, which sells VoIP products.

Each of the tools can be used to launch VoIP system attacks, such as overloading phones or VoIP exchanges with ambiguous traffic, flooding phones with calls, forcing hang-ups, rebooting phones, and reassigning the devices to other users or nobody at all, Endler said.”

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