Skype can mask hacker attacks

The report says Crowcroft claims zombie networks could be controlled by messages hidden in VOIP traffic generated by programs such as Skype, saying it was easy to write code to use a VOIP overlay to hide control messages.

DOS attacks are usually shut down by tracing control messages sent by chat and instant messaging programs. However, according to Crowcroft, if a hacker were to use a VOIP overlay as a control tool for attacks, it would be much harder to find the zombie computers.

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