Patent ID: 6947725
Filing Date: 2005-09-20
Classification: H04L,H04W

Abstract:
1. A computer program product encoding a computer program for executing a computer process on a mobile node, a network being coupled to a first base station and a second base station and the mobile node being fully authenticated by the first base station for fully authenticated access to the network, the computer process providing the mobile node with credential authenticated access to the network through the second base station prior to completion of full authentication of the mobile node by the second base station, the computer process comprising: receiving at the mobile node a credential from the first base station, conditionally upon full authentication of the mobile node by the first base station; establishing a credential key cryptographically associated with the credential to prevent use of the credential without possession of the credential key, wherein the credential key is a public key of a public-key cryptosystem and the credential includes data for authenticating the credential key; transmitting from the mobile node an authentication message including the credential to the second base station to request credential authentication from the second base station; and receiving credential authenticated access to the network for the mobile node through the second base station, if the second base station verifies the credential transmitted by the mobile node.