Nxp B.v.

U.S. Philips Corporation

Christian Schwar

Paul Hubmer

Franz Amtmann

Nikita Veshchikov

Thomas Pichler

Christian Weidinger

Peter Schmallegger

Pieter Janssens

Heinz Umfahrer

Heinz Kwas

Christoph Hans Joachim Garbe

Martin Apschner

Peter Priller

Werner Wiespointner

Abu Ismail

A method is provided for challenge-response authentication between a verifier and a prover. In the method, a challenge is received from the verifier, the challenge for verifying an identity of the prover. The challenge is computed using a first verifier key. The prover computes a response to the challenge using a first prover key. The prover also computes a delay time for delaying transmission of the response to the verifier using a second prover key and a delay computation function. The response is transmitted by the prover to the verifier at the computed delay time. The response is verifiable by the verifier using the first verifier key. An arrival time of the response is verifiable by the verifier using a second verifier key. In another embodiment, a device for providing a delayed response is provided.

Method and device for challenge-response authentication

There is described an RFID tag IC, comprising:

RFID tag IC with standard-adapted counter increment, and RFID communication system

The disclosure relates to dynamic secure messaging using near-field communication. Example embodiments include a near field communication target device () configured to respond to a read request () transmitted by a reader device () by transmitting a message () comprising an unencrypted portion and an encrypted portion, the encrypted portion incorporating a counter that is incremented each time a read request is received.

Dynamic secure messaging

An electronic article surveillance system () comprises a read/write station (-) that is designed to communicate an electronic article surveillance status test-request command comprising zone information that indicates an electronic article surveillance zone for which an electronic article surveillance status that is assigned to said zone is to be tested, and further comprises a data carrier (-) having a circuit () that is designed to store status data (SD) for indicating whether an electronic article surveillance status is active and to store zone data (ZD) for specifying at least one electronic article surveillance zone to which the electronic article status is assigned, the data carrier (-) being further designed to test whether said stored status is active for the electronic article surveillance zone to which it is assigned in the case that this zone is indicated by the zone information provided by the read/write station (-).

Electronic article surveillance system

An antenna () for communication with a multitude of transponders () is provided, the antenna () having an antenna conductor () which completely encloses at least one read/write region () intended for a transponder () individually and/or, when a multitude of read/write regions () are arranged within a continuous inner region () enclosed by the antenna conductor (), the inner region () has constrictions () between the read/write regions () so that the antenna conductor () largely encloses these read/write regions () individually. The electromagnetic field radiated by the antenna () is thereby concentrated on the read/write regions ().

Antenna for communication with a multitude of transponders

A key and lock system has a key with an integrated transponder coil that is connected to a transponder unit, and a lock with an integrated write/read coil. The key has a key bit portion and a bow portion. When the key bit portion is inserted into an elongated aperture of a key cylinder of the lock, an axis of the write/read coil forms an acute angle with an axis of the transponder coil. The acute angle substantially differs from a zero degree angle.

Growing community of inventors

Graz, Austria

Christian Schwar