Anonymous Mobility Management for Third Generation Mobile Networks

With the increasing use of mobile and nomadic communication devices requirements for security and privacy are rising as well. Following brief surveys of existing approaches to mobility management, general security considerations for UMTS and confidential storing of location information we introduce the ideas and concepts behind the new ‘anonymous subscriber’ method for UMTS, largely based on extended MIX networks. Finally, an application of this method conveniently employing the X.500 directory service infrastructure is described in some detail.