METHOD AND SYSTEM FOR MULTIPARTY COMPUTATION CAPABLE OF DETECTING MALICIOUS USER

摘要

The present invention relates to a method and a system for multiparty computation capable of detecting a malicious user. The method for multiparty computation capable of detecting a malicious user includes the steps of: generating a middle calculation value (y_i) of a user device (P_i) for multiparty computation; generating a second coded message and transmitting the same to a server; decoding the second coded message and verifying the same; transmitting first coded messages that the server received from a plurality of user devices to each of the user devices (P_i) when the verification is successful; and obtaining the middle calculation value and generating a calculation result value, thereby preventing the increase in a calculation amount by verifying the middle calculation value.;COPYRIGHT KIPO 2016