Data transaction multi-authentication privacy protection method and device and storage medium

The invention provides a data transaction multi-authentication privacy protection method and device and a storage medium, and relates to the technical field of blockchains, and the method comprises the following steps: S1, obtaining transaction requester information when a transaction request is received; s2, registering transaction requester information at a privacy registration node to obtain registration data and privacy data, and encrypting the privacy data to obtain a secret key; s3, judging whether the registration data meets a transaction operation authority requirement or not, and if yes, executing S4; otherwise, the operation is not performed; s4, carrying out transaction operation matching on the privacy data through the secret key, judging whether the matching is successful or not, and if yes, sending the registration data to a transaction right party to carry out transaction operation; otherwise, the operation is not executed. According to the invention, during data transaction, multiple authentic