Patent ID: 8892886
Filing Date: 2014-11-18
Classification: G06F,G16H,H04L

Abstract:
1. A method for establishing cryptographic communications between a remote device and a medical device, comprising: establishing unencrypted communication between the remote device and the medical device; generating an asymmetric key pair by the remote device, the asymmetric key pair comprising a public key and a private key; generating a key request message by the remote device and sending of the key request message together with the public key to the medical device; generating a pre-master key by the medical device and encryption of the pre-master key with the received public key by the medical device; generating a key response message by the medical device and sending of the key response message together with the encrypted pre-master key from the medical device to the remote device; decrypting the encrypted pre-master key with the private key by the remote device; deriving a master key as symmetric key from the pre-master key; and wherein the remote device and the medical device each compute verification data using the master key and wherein communication of application data may first start when the verification data computed by the devices have the same values.