Abstract: A privacy-preserving scheme was proposed based on proxy gateway, which avoided using the trusted center and provided high quality privacy-protecting services. First of all, based on the existing architecture of mobile Internet, the proxy gateway was employed to cache relevant service information and adopt different privacy-preserving methods for various requirements, which achieve the targeted services. Secondly, taking the location privacy as an example, a lightweight privacy-preserving scheme is designed and achieved, which fully considers the effect of side information. Finally, theoretical analysis and evaluation results show the effectiveness and safety of proposed scheme.

Key words: mobile Internet; proxy; gateway; privacy