CRYPTOGRAPHIC KEY EXCHANGE OR KEY AGREEMENT INVOLVING A DEVICE WITHOUT NETWORK ACCESS

摘要

A method (10) of cryptographic exchange of or agreement on a shared secret key between a non-network connected device (20) and a network connected device, and a corresponding non-network connected device (20) are provided. The non-network connected device (20) is arranged to receive messages having a predetermined maximum length. The method (10) comprises: initiating (11), by the non-network connected device (20), the cryptographic exchange or agreement; completing (12), by the network connected device, the cryptographic exchange or agreement; and verifying (13) the shared secret key. The method (10) may particularly be used to ensure data protection in healthcare environments.