Data processing method and device

The embodiment of the invention provides a data processing method and device which are applied to a system comprising a data provider and N multi-party secure computing (MPC) computing parties, and N is an integer greater than 3. According to the method of the embodiment, firstly, each MPC calculation party obtains a data message sent by a data provider, and obtains a first data component by using the data message; performing arithmetic sharing processing by using the first data component to obtain a second data component for performing MPC processing; wherein the N data messages received by the N MPC calculation parties comprise: the data provider splits privacy data into M data components, and the M data messages respectively carry one of the data components, M is greater than 1 and less than or equal to N, and M is a positive integer. 本说明书实施例提供了一种数据处理方法和装置，应用于包括数据提供方和N个多方安全计算MPC计算方的系统，所述N为3以上的整数。根据该实施例的方法，首先每一个MPC计算方获取数据提供方发送的数据消息，并利用所述数据消息获取第一数据分量；然后利用所述第一数据分量，进行算数共享处理，得到第二数据分量用以进行MPC处理；其中，N个MPC计算方接收到的N个数