A mobile device (10) includes a wireless network adapter (13) for communication with a wireless access network (24), and further includes a memory (23) in the mobile device for securely storing at least one pseudo-identification (IDp) of a mobile device user in conjunction with an actual identification...http://www.google.com.hk/patents/US7088989?utm_source=gb-gplus-share專利 US7088989 - Mobile user location privacy solution based on the use of multiple identities
