Data sharing method and device

The invention discloses a data sharing method and device, and the method comprises the steps that a data provider carries out the preprocessing of to-be-shared data based on a specified strategy, and the specified strategy comprises an overall processing strategy of the to-be-shared data or different processing strategies corresponding to different data segments of the to-be-shared data; taking the preprocessing result as a load part of data in a credible data format, and taking preset encrypted data as metadata in the credible data format for packaging; and sending the packaged data to a data receiver. According to the method, flexible protection means can be adopted according to scene requirements when various types of data freely flow, spread and share in a cross-system and cross-domain manner in a manner of specifying a strategy for the to-be-shared data. In the prior art, for multi-form data sharing with uncontrolled flow and propagation modes, there is no flexible mechanism to realize data protection re