Patent ID: 9628454
Date: 2017-04-18
CPC Classifications: H04L,H04W

Claim:
1. In a network comprising a mobile node, a peer node, and a mobile router, wherein a first symmetric key is known to both the mobile node and the peer node, a method performed by the mobile router, the method comprising: receiving from the mobile node a second symmetric key derived from the first symmetric key, wherein the second symmetric key was not known to the mobile router prior to the mobile router receiving the second symmetric key from the mobile node and the second symmetric key is not bound to the mobile router; receiving from the mobile node a certificate comprising encrypted information that was encrypted using the first symmetric key; using the second symmetric key to generate a digital signature; and transmitting to the peer node, on behalf of the mobile node, a set of information comprising: location update information, the certificate, and the digital signature generated using the second symmetric key.