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Radio fingerprinting is a process that identifies a cellular phone or any other radio transmitter by the "fingerprint" that characterizes its signal transmission and is hard to imitate. An electronic fingerprint makes it possible to identify a wireless device by its radio transmission characteristics. Radio fingerprinting is commonly used by cellular operators to prevent cloning of cell phones — a cloned device will have the same numeric equipment identity but a different radio fingerprint.
Essentially, each transmitter (cell phones are just one type of radio transmitter) has a rise time signature when first keyed which is caused by the slight variations of component values during manufacture. Once the rise time signature is captured and assigned to a callsign, the use of a different transmitter using the same callsign is easily detected. Such systems are used in military signals intelligence and by radio regulatory agencies such as the U.S. Federal Communications Commission (FCC) for identifying illegal transmitters. They are also used for assessing usage for billing purposes in Subscriber Mobile Radio (SMR) systems.
This topic has garnered great attention in recent years as the radio fingerprinting technique offers a "physical layer" authentication solution, which can provide fundamentally superior performance than traditional higher-layer encryption solutions. The topic has been studied by various researchers across multiple disciplines, including Signal Processing, Antenna and Propagation and Computer Science.
[1][2][3]
^Brik, Vladimir; Banerjee, Suman; Gruteser, Marco; Oh, Sangho (14 September 2008). "Wireless device identification with radiometric signatures" (PDF). Proceedings of the 14th ACM international conference on Mobile computing and networking. pp. 116–127. doi:10.1145/1409944.1409959. ISBN 9781605580968. S2CID 8960221. Retrieved 1 March 2023.
^Abanto, Luis; Bäuml, Andreas; Sim, Allyson; Hollick, Matthias; Asadi, Arash (2020). "Stay Connected, Leave no Trace: Enhancing Security and Privacy in WiFi via Obfuscating Radiometric Fingerprints". ACM Sigmetrics. 6 (4): 1346–1354. arXiv:2011.12644. doi:10.1145/3428329. S2CID 227162019.
^Shi, Yan; Jensen, Michael A. (2011). "Improved Radiometric Identification of Wireless Devices Using MIMO Transmission". IEEE Transactions on Information Forensics and Security. 6 (4): 1346–1354. doi:10.1109/TIFS.2011.2162949. S2CID 16696253.
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