Nxp B.v.

Heike Neumann

Paul Hubmer

Peter Thueringer

Bruce Murray

Hans De Jong

Susanne Stern

Reader () for determining the validity of a connection to a transponder (), designed to measure a response time of a transponder () and to authenticate the transponder () in two separate steps. Transponder () for determining the validity of a connection to a reader (), wherein the transponder () is designed to provide information for response time measurement to said reader () and to provide information for authentication to said reader () in two separate steps, wherein at least a part of data used for the authentication is included in a communication message transmitted between the reader () and the transponder () during the measuring of the response time.

Decoupling of measuring the response time of a transponder and its authentication

A method for generating a public key for an electronic device is provided, wherein the method comprises generating a public keybased on a private key and a unique identifier associated with the electronic device

Method of generating a public key for an electronic device and electronic device

An authentication method () for a secure data transmission is provided, the method comprising performing a first authentication protocol () by using a first cipher and performing a second authentication protocol () by using a second cipher. Possible inputs for the first authentication protocol () may be one shared key or several keys, and one or two random numbers.

Method for authentication and electronic device for performing the authentication

Transponder () having stored a fixed identification number, which expands said identification number with a random number, encrypts said expanded number with a key, and sends it to a reader () on its request. Reader (), which on request receives an encrypted number from a transponder (), decrypts a received encrypted number with a key, which was also used by the transponder (), and extracts a fixed identification number associated with the transponder ().

System of providing a fixed identification of a transponder while keeping privacy and avoiding tracking

Transponder (), comprising a storage unit () having stored a number of different applications, a processing unit () which, on request of a reader (), is adapted to generate a response interpretable using an encryption scheme known by both the transponder () and the reader () so that the reader () is capable of determining whether an application is supported by the transponder () by analyzing the response using the encryption scheme, and a transmission unit () adapted to send the response to said reader ().

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Hamburg, Germany

Heike Neumann