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Patent Searching and Data


Title:
RELAY ATTACK DETERMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/111741
Kind Code:
A1
Abstract:
A portable device 3 has a reception antenna 32 and a strength measurement unit 38. The reception antenna 32 has three antennas 32a, 32b, 32c, each of which receives a first request signal and a second request signal. The strength measurement unit 38 measures the reception strength, at each of the three antennas of the reception antenna 32, of the request signal S1 and the request signal S2. A relay attack determination device comprises a comparison unit 42 that performs a process for comparing the strength ratios R1, R2 of the request signal S1 and the request signal S2 on the basis of the measurement values of reception strength. When there is an invalid antenna, among the three antennas, for which the measurement value of the reception strength of the request signal S1 or the request signal S2 exceeds the usable range, the comparison unit 42 performs the comparison process excluding the invalid antenna.

Inventors:
MORI YUUKI (JP)
Application Number:
PCT/JP2020/038723
Publication Date:
June 10, 2021
Filing Date:
October 14, 2020
Export Citation:
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Assignee:
MARELLI CORP (JP)
International Classes:
E05B49/00; B60R25/24; H04B1/59; H04B17/318; H04Q9/00
Domestic Patent References:
WO2018186075A12018-10-11
WO2018070219A12018-04-19
WO2019193866A12019-10-10
Foreign References:
JP2019041348A2019-03-14
JP2019105026A2019-06-27
JP2019083436A2019-05-30
US20160117877A12016-04-28
Attorney, Agent or Firm:
TAKEHARA Naohiko et al. (JP)
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