Temporary Mobile User Certificate for Mobile Information Services in UMTS

Byung-Rae LEE
Kyung-Ah CHANG
Tai-Yun KIM

IEICE TRANSACTIONS on Communications   Vol.E83-B    No.8    pp.1880-1886
Publication Date: 2000/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
certificate,  authentication,  UMTS,  ASPeCT,  public key cryptography,  

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This paper presents an efficient public-key protocol for mutual authentication and key exchange designed for mobile information services in UMTS. Certain modifications to the ASPeCT registration protocol is proposed to introduce Temporary Mobile User Certificate in UMTS environments. Proposed Temporary Mobile User Certificate, digitally-signed by the private signing key of the TTP located in the user's visiting domain, will be issued to the user during the registration protocol. ASPeCT AIP protocol can be modified to reduce communication overhead and speed up verification process using Temporary Mobile User Certificate between the user and the Value-Added Service Provider (VASP) located in the user's visiting domain. Furthermore, Temporary Mobile User Certificate can provide anonymity for a mobile user during the ASPeCT AIP protocol.