Secure Provision of a Key

摘要

The embodiments relate to a method and a digital circuit area for securely providing a key using a request unit and a provision unit. In this case, a key is derived from parameters, at least one of which is used for the key derivation in a non-predefinable manner by the request unit. In this case, the key derivation is carried out in a digital circuit area in which the request unit and the provision unit are implemented.

主权项

1. A method for securely providing a derived key using a request unit and a provision unit, which are implemented in a common digital circuit area, the method comprising:
requesting, by the request unit, the derived key from the provision unit; transmitting a first parameter from the request unit to the provision unit, wherein the first parameter is predefined by the request unit; determining a secret key by the provision unit, wherein the request unit does not have access to the secret key; generating the derived key by the provision unit by a key derivation function in a key derivation module from the secret key, the first parameter, and a predefined second parameter, the second parameter being used for the key derivation function in a non-predefinable manner by the request unit; providing the request unit with the derived key.