Apparatus and method for securing a negotiation of at least one cryptographic key between devices

摘要

The present invention relates to a method and a device 1 for securing a negotiation of at least one cryptographic key KS. For this purpose, in a preferred embodiment, a private key PS and a public key OS are provided when a device is manufactured and stored in this device. Subsequently, the at least one cryptographic key KS is negotiated, this negotiation being safeguarded as a function of the created private key PS and / or the public key OS. The present invention can be used, for example, in building automation.