Abstract: The present invention relates to a chip card comprising: an interface (112) to a master device (120), a single tasking processor (102) for receiving chip card commands from the master via the interface, first program instructions (106) for execution by the processor, the first program instructions implementing a chip card function, second program instructions (110) for execution by the processor, the second program instructions implementing an endless loop, third program instructions (108) for execution by the processor, the third program instructions being adapted to start execution of the second program instructions in response to a blocking signal.

Abstract: A method of assigning a secret to a security token (100) comprising: receiving first biometrical data (108) of a biometrical feature of a person by the security token, storing the first biometrical data in the security token, storing the unencrypted secret in the security token, biometrically encrypting the secret using the first biometrical data by the security token, storing the encrypted secret in the security token, erasing the unencrypted secret and the first biometrical data from the security token.