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DISTANCE BOUNDING: A PRACTICAL SECURITY SOLUTION FOR
REAL-TIME LOCATION SYSTEMS
ABSTRACT:
The need for implementing adequate security services in industrial applications is increasing.
Verifying the physical proximity or location of a device has become an important security
service in ad-hoc wireless environments. Distance-bounding is a prominent secure neighbor
detection method that cryptographically determines an upper bound for the physical distance
between two communicating parties based on the round-trip time of cryptographic challengeresponse pairs.
This paper gives a brief overview of distance-bounding protocols and discusses the possibility of
implementing such protocols within industrial RFID and real-time location applications, which
requires an emphasis on aspects such as reliability and real-time communication. The practical
resource requirements and performance tradeoffs involved are illustrated using a sample of
distance-bounding proposals, and some remaining research challenges with regards to practical
implementation are discussed.