Anonymous authentication method and system for trust in decentralized mobile crowdsourcing

Abstract

The invention belongs to the technical field of data processing, and discloses an anonymous authentication method and system for trust in decentralized mobile crowdsourcing. The method comprises the steps: generating a new public and private key pair at a node registered in a blockchain system, generating a key change request, transmitting the key change request to a trusted execution environmentof a cloud server, enabling the cloud server to process a node key change signal, secretly linking a trust evaluation result, and issuing a key change result on the blockchain system; performing trustauthentication on the signature node via the signature verification node through the blockchain system by using the changed private key signature message. All public key signature mechanisms such asRSA and the like are selected according to needs, and a trust evaluation scheme based on behaviors is included and is not limited to use of a Bloom filter. A feedback-based trust evaluation scheme isincluded, and a game theory-based method, a machine learning-based scheme and a trust theory-based method can be adopted for weight calculation.

Description

technical field [0001] The invention belongs to the technical field of data processing, and in particular relates to an anonymous authentication method and system for trust in blockchain-based decentralized mobile crowdsourcing. Background technique [0002] Mobile Crowdsourcing (MCS) is a new data collection system that collects data with the help of mobile devices. The traditional MCS is based on a centralized architecture, which faces security, privacy and trust issues caused by single point of failure and untrusted central entities. Therefore, it is necessary to design a decentralized MCS system. [0003] However, the decentralized MCS system lacks a trusted center to evaluate and guarantee node trust, so it needs decentralized trust evaluation and supports the certification of node trust. Considering the needs of nodes for identity privacy and data privacy, it is necessary to implement anonymous authentication of trust, that is, anonymous trust authentication. [000...

AI Technical Summary

Problems solved by technology

[0008] Through the above analysis, the existing problems and defects of the existing technology are as follows: (1) The trust evaluation method based on the blockchain smart contract has high cost and poor efficiency, and lacks privacy protection for node trust-related data

[0009] (2) The decentralized authentication method based on zero-knowledge proof takes a long time to generate proof and is inefficient

[0010] (3) A decentralized authentication method based on blockchain-based public key infrastructure (Public Key Infrastructure, PKI), which cannot prevent attackers from tracking node behavior due to the open and transparent nature of blockchain

There is a contradiction between the credibility and efficiency of decentralized trust evaluation; there are difficulties in the anonymous trust authentication of the blockchain-based mobile crowdsourcing system

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