Public verification truth value determination method based on privacy protection

The invention relates to a public verification truth value determination method based on privacy protection. In the truth value discovery stage, a task executor and a platform use a threshold-based Paillier homomorphic encryption system, and truth value discovery is completed on the premise of protecting privacy data of the task executor. Meanwhile, the task executor generates homomorphic hash values related to data of the task executor and corresponding random numbers and commitment values in the truth value discovery stage, the commitment values are sent to the platform, the homomorphic hash values and the random numbers are reserved, and the platform sends the commitment values to the verifier. In the verification stage, a task executor sends all homomorphic hash values and random numbers to a verifier through the platform, the verifier verifies commitment values received from the platform through the random numbers and the homomorphic hash values, and the platform is prevented from tampering with data. Af