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#100026 - 1st Feb 2005 2:20pm 'Thiefproof' car key cracked
Tony MK2 Offline
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Registered: 2nd Dec 2003
Posts: 2943
Loc: Wirral
Researchers have discovered cryptographic vulnerabilities in the RFID technology used in high-security car keys and petrol pump payment systems. The attack against Texas Instruments DST tags used in vehicle immobilisers and ExxonMobil's SpeedPass system was identified by experts at Johns Hopkins University and RSA Laboratories.

The algorithm used in TI's DST tags is an unpublished, proprietary cipher that uses a 40-bit key. Using a black-box reverse-engineering method, the team was able to unravel the algorithm used in the DST tags. This information allowed them to programme a commercial microchip costing less than $200 to find the secret key of a gasoline purchase tag owned by one of the researchers. Using 16 of these FPGAs (Field Programmable Gate Array) devices in parallel allowed researchers to reduce search time from 10 hours to around 15 minutes.

The vulnerable technology is used in more than six million key chain tags used for wireless gasoline purchases and in an estimated 150 million keys for newer vehicles built by at least three leading manufacturers. The researchers warn that tech-savvy criminals could wirelessly probe a car key tag or payment tag in close proximity, and process this data using the code breaking techniques to crack secret keys and circumvent cryptographic security safeguards. This might allow crooks to charge their own gasoline purchases to the tag owner's account or to get around electronic vehicle immobilisation techniques. Crooks would still need to defeat physical locks to steal cars.

"We've found that the security measures built into these devices are inadequate," said Avi Rubin, technical director of the Johns Hopkins Information Security Institute and an author of the study. "Millions of tags that are currently in use by consumers have an encryption function that can be cracked without requiring direct contact. An attacker who cracks the secret key in an RFID tag can then bypass security measures and fool tag readers in cars or at gas stations."

The researchers have alerted Texas Instruments about the initial findings of their research, which continues. The team recommends a program of distributing free metallic sheaths to cover its RFID devices when they are not being used in order to make attacks more difficult.

The company that markets ExxonMobil's SpeedPass system has said it has no knowledge that any fraudulent purchases have ever been made with a cloned version of its device.

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#100027 - 1st Feb 2005 3:25pm Re: 'Thiefproof' car key cracked
Tony MK2 Offline
Forum Master

Registered: 2nd Dec 2003
Posts: 2943
Loc: Wirral
Nothing is safe these days and to think back in the days long long time ago you could leave everythink and anythink unlocked and now! everythink has to be locked and alarmed what is the world coming to frown

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#100028 - 2nd Feb 2005 10:44pm Re: 'Thiefproof' car key cracked
lazy_ben Offline
Wise One

Registered: 5th Jan 2004
Posts: 868
Loc: Moreton
Quote:
Originally posted by Tony MK2:
everythink and anythink and everythink
Its 'everything' and 'anything' Tony.
But I agree, thieves are scum.
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new msn/email: bena3turbo@hotmail.com

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#100029 - 3rd Feb 2005 7:33pm Re: 'Thiefproof' car key cracked
dave the rave Offline
Old Hand

Registered: 27th Aug 2004
Posts: 331
Loc: greasby wirral
Quote:
Originally posted by Tony MK2:
Nothing is safe these days and to think back in the days long long time ago you could leave everythink and anythink unlocked and now! everythink has to be locked and alarmed what is the world coming to frown
u see tony me old pal sum of us r not that old to think that long back <img border="0" alt="[Roll around the floor laffin]" title="" src="graemlins/cwemotions065.gif" />
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