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What is International Mobile Subscriber Identity (IMSI), Temporary-IMSI (TMSI)

Chapter 13
Handbook of Research on Wireless Security
IMSI and TIMSI is the unique identity number used in UMTS to indentify a subscriber. The temporary one is renewed from time to time, and that is the only one that is used over the air interface.
Published in Chapter:
Authentication, Authorisation, and Access Control in Mobile Systems
Josef Noll (University Graduate Center – UniK, Norway) and György Kálmán (University Graduate Center – UniK, Norway)
Copyright: © 2008 |Pages: 13
DOI: 10.4018/978-1-59904-899-4.ch013
Abstract
Converging networks and mobility raise new challenges towards the existing authentication, authorisation, and accounting (AAA) systems. Focus of the research is towards integrated solutions for seamless service access of mobile users. Interworking issues between mobile and wireless networks are the basis for detailed research on handover delay, multi-device roaming, mobile networks, security, ease-of-use, and anonymity of the user. This chapter provides an overview over the state of the art in authentication for mobile systems and suggests extending AAA mechanisms to home and community networks, taking into account security and privacy of the users.
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