ASSA ABLOY's relay attack detection system uses dual time measurements between initiator and responder devices to identify unauthorized signal relay attacks in access control.

Patentradars sammanfattning

This PCT application from ASSA ABLOY AB discloses an initiator device for access control systems that detects relay attacks by comparing two independent time measurements. The initiator measures the round-trip duration from command transmission to response receipt, while the responder device separately measures and reports its own internal command execution time. When the difference between these measurements exceeds expected thresholds, the system flags a potential relay attack. This dual-measurement approach enables detection of man-in-the-middle relay scenarios common in wireless access control exploitation.

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