A ticket generation method for protecting user access privacy in network services

Abstract

The invention discloses a method of generating a bill for protecting user access privacy in network service. The method comprises the following steps: (1) performing system initiation, namely generating a system public parameter pps according to the input system security parameter, and respectively generating public key / private key pairs of groups G managed by a management mechanism M, a detection mechanism D and a recognition mechanism O; (2) constructing a group signature key xi by a user Ui and acquiring an authorization certification Ci about the group signature key xi of the user Ui from the management mechanism M; (3) constructing request information of protecting the user access privacy and a group signature thereof according to the request information by the user; (4) identifying the legality of the request information by the recognition mechanism O and determining that the qualification of group members of the user is not repealed; (5) verifying the legality of the information by utilizing the group signature by the detection mechanism D, acquiring legal service types and providing corresponding anonymous service; and (6) generating the service bill for protecting the user access privacy by the recognition mechanism O. The method disclosed by the invention can be used for effectively protecting the user access privacy and has the advantages of low communication cost, high safety and the like.

Description

Technical field [0001] The invention belongs to the technical field of authentication and identification for protecting user access privacy in network services, and in particular relates to a ticket generation method for protecting user access privacy in network services. Background technique [0002] The 21st century is the era of network information. With the development of microelectronics, optoelectronics, computers, communications, and information service industries, software systems supporting the Internet have also developed rapidly. Widely used in the industry. While computer systems and Internet networks play an important role in national economic growth, the issue of system security and its importance have become increasingly prominent. When receiving service activities in cyberspace, people are most worried about security. The key security requirements include: the identity authentication of all parties involved in the activity, the confidentiality of the session, th...

AI Technical Summary

Problems solved by technology

Generally, the output length of Proceed(α,ρ,chpk) is relatively large (for example, Proceed(α,ρ,chpk)=chpk α g ρ modn, the maximum output length is log 2 n, and requires 2 modulo exponent operations), and the sensitive data α representing the service type is usually much smaller than n, this invention can send m d ||α||C||m f , also need to transmit ρ∈{0,1} λ and group signature sg, its communication cost is λ+α+|m d |+|C|+|m f |+|sg|, so the communication cost of the invention is relatively large

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