MULTI-PARTY COLLABORATIVE DATA PROCESSING METHOD AND APPARATUS CAPABLE OF PROTECTING DATA PRIVACY

Provided in the embodiments of the present specification are a multi-party collaborative data processing method and apparatus capable of protecting data privacy. Multiple parties are three participants, and target data is divided into three target shards. Any i-th party among the multiple parties holds a shard sum value of two target shards corresponding thereto and a specified shard that meets a preset rule among the two target shards. The method is executed by the i-th party, and comprises: obtaining two calculation shards corresponding to the i-th party among three calculation shards obtained by dividing calculation data; on the basis of the shard sum value, the specified shard and the two calculation shards, determining a first result shard of a product result of the target data and the calculation data, and sending the first result shard to a next participant of the i-th party; and receiving a second result shard of the product result from a previous participant of the i-th party, the second result shard