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公开(公告)号：EP3873120A1
公开(公告)日：2021-09-01
申请号：EP20160095.4
申请日：2020-02-28
申请人： NXP B.V.
发明人： NOWOTTNICK, Juergen
摘要： Disclosed is a method of wireless communication between a vehicle base station (130) and a transponder (140), the method comprising: i) driving first and second antennae (110, 120) on the vehicle by the vehicle base station (130) using first driving currents, the first antenna (110) being separated from the transponder (140) by a portion of a vehicle in which the vehicle base station (130) resides; ii) detecting three separate mutually orthogonal vector components of the respective fields emitted by the first and second antennae (110, 120) and received at the transponder (140); iii) calculating superposition factors for the first and second antennae (110, 120) based upon the separate vector components; iv) concurrently driving the first and second antennae (110, 120) using the same phase, respectively using the first driving currents multiplied by the calculated superposition factors; v) detecting three mutually orthogonal vector components of a superposed signal including signals from both antennae (110, 120) received at the transponder (140); vi) determining whether two of the three detected vector components are above a threshold noise level; vii) if fewer than two of the three detected vector components are above the threshold noise level, repeating step iv) with one of the first and second antennae being driven by the first driving current multiplied by the calculated superposition factors and by an adjustment factor; and viii) if two of the three detected vector components are above the threshold noise level, authenticating the transponder (140) in response to the detected superposed vector components being within an error-based range of the sum of the separate vector components for each of the first and second antennae as multiplied respectively by the superposition factors for the first and second antennae.
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公开(公告)号：EP3471334A1
公开(公告)日：2019-04-17
申请号：EP17195646.9
申请日：2017-10-10
申请人： NXP B.V.
摘要： In accordance with a first aspect of the present disclosure, a method for configuring a transponder is conceived, comprising: deriving a signature from a physical unclonable function; verifying said signature; initiating a key training sequence between a base station and the transponder in dependence on a result of verifying the signature. In accordance with other aspects of the present disclosure, a corresponding computer program, transponder and base station are provided.
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4.发明公开
公开(公告)号：EP3462669A1
公开(公告)日：2019-04-03
申请号：EP18187495.9
申请日：2018-08-06
申请人： NXP B.V.
发明人： NOWOTTNICK, Juergen
摘要： Embodiments of an authentication system and a method for authentication using ciphers are described. In the system and method, cryptographic calculations of an encryption algorithm are executed at a base station, in a determined secure environment, to produce a pre-calculated cipher for a subsequent authentication process. The pre-calculated cipher is then used to transmit an authentication request message from the base station and validation of an authentication response message for the subsequent authentication.
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