Patent ID: 9603012
Date: 2017-03-21
CPC Classifications: H04B,H04L,H04W,Y04S

Claim:
1. A method to establish a secure connection between a first communication device and a second communication device, the method comprising: reaching an agreement with the second communication device over an unsecure connection on one or more messages to be used to generate a secret key; collecting the one or more messages from messages exchanged between the first communication device and a smart meter over a power line; generating the secret key from the one or more messages through use of one or more of: transmission times, timestamps, and identifications on the one or more messages; and transmitting a packet to the second communication device, the packet comprising the secret key, a shared key, and an encrypted nonce, wherein the second communication device is enabled to establish the secure connection with the first communication device in response to decrypting the encrypted nonce.