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G8PZT > TECH 18.08.13 13:01l 39 Lines 1955 Bytes #999 (0) @ WW
BID : 000961229PZT
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Subj: Transmitter fingerprinting
Path: IZ3LSV<IK2XDE<PY1AYH<PY1AYH<CX2SA<VK2DOT<GB7PZT
Sent: 130818/1155Z @:GB7PZT.#24.GBR.EU [Kidderminster] #:96100 XSERV500a
From: G8PZT@GB7PZT.#24.GBR.EU (Paula)
To: Tech@ww
Subject: Transmitter fingerprinting
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"Fingerprint" of the transmitted signal allows mobile identification
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Scientists at the Technical University of Dresden have developed a method
developed with the help of which GSM mobile phones using the "fingerprint"
of their Transmit signal can be identified.
The Dresden scientists used to the fact that the transmitted signal of each
cell phones because of manufacturing tolerances of the equipment components
has certain individual characteristics. By analyzing these characteristics
can identify with almost every mobile phone. In tests with 13 mobile phones
the scientists succeeded with an accuracy of more than 97 percent,
assign the transmit signal to each device.
Applications of this technique see the Dresden researchers as at Prosecution
of criminal offenses. The identification of GSM mobile phones via the Device
identifier IMEI is uncertain, because this ID using appropriate software
can be changed. The individual "fingerprint" a mobile station is however
considered to be largely forgery.
The Dresden scientists describe their method for Mobile identification in
a (English) study on the Internet
under http://www.dence.de/publications/Hasse13_GSMMobilePhoneIdentification.pdf
can be downloaded.
The principle radios to identify the basis of their "fingerprint" is not
new. Already in 1994, the American radio amateur Phil Farrell, K7PF, developed
such a method and marketed commercially. In 1995 brought Richard Rager,
KB8RLN, the DOS program "Xmit_ID" out identify with the help of which stations
according to their transient
leave (the radio magazine reported). Comprehensive information on this Program
as well as a link to download still stand today on the internet under www.qsl.net/n/n9zia//xmit_id
available.
Source: www.funkmagazin.de
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