SYSTEM AND METHOD FOR PSEUDONYM AUTHENTICATION BASED ON OBLIVIOUS TRANSFER

摘要

PURPOSE: A system and a method for pseudonym authentication based on oblivious transfer are provided to enable the tracking of an actual name for a user device limitedly and prevent the exhaustion of fictitious names by generating virtual names through the combination of the preliminary fictitious names. CONSTITUTION: A service provider(120) provides the set of preliminary fictitious names used for the authentication of fictitious names and an authentication key of the set to a user device(100), and supplies the indexes of the set to a judgment agency(110). If the user device requests the fictitious authentication, the judgment agency transmits the selected indexes to the user device and verifies the validity of the authentication key. The user key combines the preliminary fictitious names corresponding to the preliminary fictitious index in the fictitious name authentication.