ELECTRONIC COMMUNICATION SYSTEM, IN PARTICULAR ACCESS CONTROL SYSTEM FOR P(ASSIVE)K(EYLESS)E(NTRY), AS WELL AS METHOD FOR DETECTING A RELAY ATTACK THEREON

• US 20090206989A1
• Filed: 09/20/2005
• Published: 08/20/2009
• Est. Priority Date: 09/30/2004
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Leitch, Adam
• Application Number:
  US11/576,462
• Publication Number:
  US 20090206989A1
• Time in Patent Office: Days
• US Class Current: 340/5.610
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00555 comprising means to detect or avoid relay attacks
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In order to provide an electronic communication system (100), in particular an access control system for P[assive]K[eyless]E[ntry], comprising at least one base station (10) being arranged in particular on or in an object to be secured against unauthorized use and/or against unauthorized access, for example being arranged on or in a vehicle and/or on or in an access system, at least one remote device (20), in particular at least one transponder unit, which remote device (20) may in particular be carried with him by an authorized user and/or is designed to exchange data signals (12, 22) with the base station (10), in which case, by means of the data signals (12, 22) the authorization for use and/or for access can be determined and/or the base station (10) can be controlled accordingly, wherein cost and complexity of the remote device (20) are reduced, it is proposed that the remote device (20) comprises at least one recording unit (24) for recording at least part of the data signals (12, 22), in particular for recording at least one first signal (12), being sent by the base station (10), and that the base station (10) comprises at least one processing unit (14) for processing the data signals (12, 22).

Claims

1. An electronic communication system, in particular an access control system for P[assive]K[eyless]E[ntry], comprising

at least one base station being arranged in particular on or in an object to be secured against unauthorized use and/or against unauthorized access, for example being arranged on or in a vehicle and/or on or in an access system,

at least one remote device in particular at least one transponder unit, which remote device

may in particular be carried with him by an authorized user and/or

is designed to exchange data signals with the base station in which case, by means of the data signals

the authorization for use and/or for access can be determined and/or

the base station can be controlled accordingly, characterized in

that the remote device comprises at least one recording unit

for recording at least part of the data signals in particular for recording at least one first signal being sent by the base station and

that the base station comprises at least one processing unit for processing the data signals

2. The electronic communication system according to claim 1, characterized in

that the processing unit designed for determining the distance between the base station and the remote device by means of determining the T[ime]O[flF[light] (t,) of at least part of the data signals and

that the authorization for use and/or for access is determined at least dependent on the determined distance between the base station and the remote device

3. The electronic communication system according claim 1, characterized in that the processing unit designed

for measuring the carrier frequency of at least part of the data signals being (re)transmitted by the remote device and/or

for determining at least one clock rate of the remote device and/or

for correlating

at least part of the data signals and/or

the determined clock rate of the remote device

4. A remote device for an electronic communication system according to claim 1, characterized by

at least one receiving unit for receiving at least part of the data signals in particular for receiving at least one first signal being sent by the base station

at least one recording unit for recording at least part of the data signals in particular for recording at least one sent first signal being sent by the base station

at least one clock unit for providing at least one clock rate,

at least one transmission unit (re)transmitting the data signals in particular

for retransmitting at least one first signal being sent by the base station and

for transmitting at least one second signal to the base station

5. A base station for an electronic communication system according to claim 1, characterized by

at least one transmission unit for transmitting at least part of the data signals in particular at least one first signal to the remote device

at least one receiving unit for receiving the data signals being transmitted by the remote device and

at least one processing unit for processing the data signals

6. A method for detecting and/or for guarding against at least one, in particular external, attack, and preferably at least one relay attack, on at least one electronic communication system according to the preamble of claim 1, characterized in

that at least part of the data signals in particular at least one first signal being sent by the base station is recorded by the

remote device and

that the data signals are processed by the base station

7. The method according to claim 6, characterized in

that part of the data signals in particular the first signal being sent by the base station is recorded against at least one clock unit and/or

that the data signals in particular

the first signal being sent by the base station and

at least one second signal preferably including the retransmission time, are transmitted to the base station.

8. The method according to claim 6, characterized in

that the transmitted data signals are received, and/or

that the carrier frequency of at least part of the data signals being transmitted by the remote device is measured, and/or

that at least one clock rate of the remote device is determined, and/or

that at least part of the data signals and/or the determined clock rate of the remote device is correlated by the base station

9. The method according to claim 6, characterized in

that the distance between the base station and the remote device is determined by means of determining the T[ime]O[flF[light] (t,)of at least part of data signals and

that the authorization for use and/or for access is determined at least dependent on the determined distance between the base station and, the remote device

10. (canceled)