US 7,594,113 B2
Identification information protection method in WLAN inter-working
Pek Yew Tan, Singapore (Singapore); Hong Cheng, Singapore (Singapore); and Toyoki Ue, Yokohama (Japan)
Assigned to Panasonic Corporation, Osaka (Japan)
Appl. No. 10/530,404
PCT Filed Oct. 14, 2003, PCT No. PCT/JP03/13103
§ 371(c)(1), (2), (4) Date Apr. 07, 2005,
PCT Pub. No. WO2004/034645, PCT Pub. Date Apr. 22, 2004.
Claims priority of application No. 2002-299569 (JP), filed on Oct. 11, 2002.
Prior Publication US 2006/0101273 A1, May 11, 2006
Int. Cl. G06F 21/00 (2006.01); G06F 15/16 (2006.01); H04L 9/32 (2006.01)
U.S. Cl. 713—169  [713/182; 726/5; 726/14] 7 Claims
OG exemplary drawing
 
1. A user identification information protection method comprising the steps of:
performing a hierarchical encryption of a message containing an identification message of a mobile user by encrypting a part containing identification information of the mobile user in the message using an encryption key which is derived from subscription information of the mobile user, and by further encrypting the encrypted message using a public key of a home domain server;
routing the encrypted message to a network to which the home domain server belongs, using home domain information;
further concealing actual identification information of the mobile user using a temporary domain specific identifier; and
performing mutual authentication of a mobile terminal and a plurality of network elements using a challenge message response exchange scheme.