Content Inside :
Motivation
* Severe challenge for RFID security on mobile devices, because
o RFID systems are still in its infant stage.
+ Many RFID Systems are lack of security protection.
o To improve productivity, more mobile devices will be used.
+ Mobile systems are more vulnerable than non-portable systems.
* Limitations for RFID malwares are being relaxed as the development of technology.
o Cheaper RFID tags with larger storage capacity – hold more malicious data.
o Better network connection for mobile devices – easier for malware propagation.
New Opportunities for RFID Malwares
C1: The tag data size limitation (<1024 bits) make RFID malware unrealistic.
EPC Gen2 Class3 Tags have at least kilo bytes storage.
C2: RFID Systems are closed-loop systems.
New RFID Standard: EPCglobal Architecture may require exchanging data with EPCglobal Network through the Internet.
C3: More mobile devices will be used as RFID readers.
Lessons from Practices (1/2)
* L1: A small number of bits are enough to construct a RFID malware. RFID malwares can spread itself by modifying database for tag value writing.
o In 2006, researchers in Vrije University proposed the first proof-of-concept malware design and basic propagation model.
o Even when the space is very limited, it is still possible to store a smaller malware trigger in a RFID tag which may awake malwares that already exist in the system.
Lessons from Practices (2/2)
* L2: Malwares may trigger exception flow to bypass pure data level protection mechanism. System level protection is required.
o In 2007, German RFID experts shows how to crash RFID Reader for RFID enabled E-Passport by modifying JPEG2000 photo image file in E-Passport.
o exploit buffer overflow vulnerability in off-the-shelf libraries when loading the photo image.
Basic Threat Model & Countermeasures
1. Defend Cloning and Counterfeiting
2. Defend Malware
3. Defend Denial-of-Service
Less attention for front-end devices as (mobile) RFID reader!
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Category : Mobile Systems