A secure privacy-preserving roaming protocol based on hierarchical identity-based encryption for mobile networks
Zhiguo Wan, Kui Ren, Bart Preneel · 2008
Roaming services in wireless networks provide people with preferable flexibility and convenience. However, such ad-vantages should be offered with both security and privacy in mind. With consideration on privacy protection during roaming in wireless networks, we proposed a hierarchical ID-based roaming protocol in this paper. In our scheme, we use a 2-layer hierarchical ID-based cryptosystem in which a trusted party acts as the root authority, each domain server acts as the second-layer authority, and the roaming user is the end user. With the hierarchical ID-based cryptosystem, we can avoid involvement with home network, and keep the roaming the user’s identity private. Furthermore, not only the root authority is relieved from management of a large amount of private/public key pairs, but the domain servers are free to generate key pairs for their registered users. At the same time, we use hash chains together with ID-based signatures to achieve non-repudiation for service payment. Categories and Subject Descriptors