Patent ID: 9237444
Filing Date: 2016-01-12
CPC Classification: H04L,H04W

Claim Text:
1. A method to establish trust between a first terminal in a communications network and a second terminal in the communications network, the method comprising: at the first terminal, receiving from a network node (i) authentication data unique to the first terminal, from which a compact representation of verification data for the first terminal can be derived, and (ii) a compact representation of verification data for a plurality of terminals in the communications network, the compact representation of verification data for the plurality of terminals being certified by the network node, and the plurality of terminals comprising the first terminal and the second terminal; at the first terminal, deriving trust information from the authentication data unique to the first terminal; sending from the first terminal to the second terminal a message including the trust information and at least a part of the authentication data, the second terminal also having received from the network node the compact representation of verification data for the plurality of terminals; and at the second terminal, verifying the authenticity of the message from the first terminal using the compact representation of verification data for the plurality of terminals and the received trust information and authentication data.