METHOD AND SYSTEM FOR MULTIPARTY COMPUTATION WITH MALICIOUS DETECTION

摘要

Using a multi-party computation system comprising a verification server and a plurality of user equipment to detect a malicious user, the first secret value a first private value of the user equipment ( ) And the secret value of the second secret value of the second user equipment ( ) A method of performing a multi-party computation is started on. Performing multi-party computation method, each of the user equipment ( ) Is the first private value received from the first user equipment ( ) A first share of the ( ) And a second secret value received from the user ( ) A second share of the ( ), The user device for multi-party computation and, to do using ( Intermediate calculation value) ( ) Phase, each of the user device for generating a ( ), An intermediate calculation value ( ) Comprising the steps of first generating a ciphertext, commitments, and non-interactive zero-knowledge proof, encrypted to generate a second encrypted text, and transmitting the second encrypted text to the server for the step of the server decodes and validates a second encrypted text, If it passes validation, the server, each user device receives the first cipher text from a plurality of user equipment ( ) Phase, and each user device that transmits a ( ) It is obtained the intermediate calculation value by decoding the first cipher text, and by rebuilding it includes generating a result value.