Considering the requirements of data verification, anonymous malicious behavior detection and cross-platform resource interaction in privacy crowdsourcing, a scheme under the consortium chain architecture is proposed, basing on blockchain technology with zero-knowledge proof and ring signature technology. The proposed scheme relies on zero-knowledge proof to achieve encrypted data verification, relies on improved revocable-iff-linked ring signature to achieve controllable anonymity of workers, introduces consortium chain to realize resource interaction between crowdsourcing entities. In addition to completing the crowdsourcing process, the scheme also implements data protection and identity protection required for privacy crowdsourcing. Security analysis shows that the proposed scheme satisfies privacy, verifiability, controllable anonymity and fairness. Experimental results verify the advantages of the proposed scheme in efficiency and performance.
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