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September 07, 2006

MAC address spoofing on wireless networks could come to an end with a new security technique that would allow network administrators to see a unique WiFi fingerprints for each device, reports Ars Technica.


Dr. Jeyanthi Hall, a researcher at Carleton University analyzed (pdf) the radio frequency (RF) signal of 15 devices and discovered that each and every device has its own unique signal. Even devices from the same manufacturer are unique due to variations during the manufacturing process. The signals were so clearly different from one another that she had a 95 percent detection rate with zero false positives during her testing.

MAC addresses are a unique, alphanumeric identifier assigned to each individual network card. Network administrators use these identifiers to distinguish between individual machines on a network and ultimately limit network access to approved machines.

However, savvy users quickly realized that they could easily spoof MAC addresses from other machines on their own devices to pose as someone else on the network. Although limiting network access to specific MAC addresses is very common, it is not considered the best form of network security for this reason.

Ars Technica says most admins now utilize user authentication and proxying in order to identify users rather than easily spoofed MAC addresses. However, if wireless hardware were to utilize this technology and combine it with MAC addresses, unique device identification could pick up steam once again, says Ars Technica.


Originally posted by samc from Daily Wireless, remediated by yatta on Sep 7, 2006 at 01:58 PM