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Received: 2005-09-21

Revision Accepted: 2006-01-09

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.6 P.984-989


Protection of mobile location privacy by using blind signature

Author(s):  LIAO Jian, QI Ying-hao, HUANG Pei-wei, RONG Meng-tian, LI Sheng-hong

Affiliation(s):  Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   liaojian@sjtu.edu.cn

Key Words:  Mobile computing, Location privacy, Security techniques and system, Blind signature, Location-based services

LIAO Jian, QI Ying-hao, HUANG Pei-wei, RONG Meng-tian, LI Sheng-hong. Protection of mobile location privacy by using blind signature[J]. Journal of Zhejiang University Science A, 2006, 7(6): 984-989.

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location privacy means a user keeps his/her geographical location secret. If location information falls into the wrong hands, an adversary can physically locate a person. To address this privacy issue, Qi et al.(2004a; 2004b) proposed a special and feasible architecture, using blind signature to generate an authorized anonymous ID replacing the real ID of a legitimate mobile user. The original purpose of his architecture was to eliminate the relationship of authorized anonymous ID and real ID. We present an algorithm to break out Qi’s registration and re-confusion protocol, and then propose a new mechanism based on bilinear pairings to protect location privacy. Moreover we show that the administrator or third parity cannot obtain information on the legitimate user’s authorized anonymous ID and real ID in our proposed protocols.

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