Patent ID: 6823461
Filing Date: 2004-11-23
Classification: H04L,H04W

Abstract:
A method for enabling a new access router (NR) to communicate securely with a Node (N) over a network, comprising:(a) enabling a Security Association (SA) between a previous access router (PR) and N; (b) employing the SA between PR and N to enable NR to communicate securely with N when N is associated with NR; and (c) if N is subsequently associated with NR instead of PR, causing PR to securely transfer at least one context associated with N from PR to NR; (d) if NR differently enables at least one element of a transferred context for N, causing NR to securely provide an update to N indicating each different element of the transferred context; and (e) enabling another security association to be created between NR and N for the transferred context such that the other security association is based on the context transferred by PR to NR, and such that, if an update to the context is provided by NR to N, the other security associated is also based on the update.