Secure two-party real number comparison method and apparatus based on nonlinear mapping

A secure two-party real number comparison apparatus based on nonlinear mapping, comprising:

• a task acquisition module, configured to analyze and obtain secure two-party real number comparison request information sent by a computing requester, wherein the secure two-party real number comparison request information comprises a real number comparison request, a first secure party node and a corresponding first secure party real number, as well as a second secure party node and a corresponding second secure party real number;
• a secure computation module configured to match a corresponding secure two-party real number comparison protocol based on the real number comparison request;
• a comparison computation module configured to execute the secure two-party real number comparison protocol on the first secure party real number and the second secure party real number based on the first secure party node and the second secure party node to obtain a first secure party computation result and a second secure party computation result;
• and
• a data transmission module configured to return the first secure party computation result and the second secure party computation result to the computing requester, and determine, at the computing requester, a real number comparison result between the first secure party real number and the second secure party real number based on the first secure party computation result and the second secure party computation result;
• wherein the secure two-party real number comparison protocol is determined based on a secure two-party nonlinear mapping protocol and sign conversion processing;
• the secure two-party nonlinear mapping protocol is determined based on vector space mapping transformation and a secure two-party dot product protocol;
• and the secure two-party dot product protocol is determined based on random vectors, random numbers, an auxiliary computing node, and a secure data disguising technology.