User authentication method and device

The invention provides a user authentication method and device, and relates to the technical field of data processing. When the proxy equipment implements the method, the proxy equipment receives an authentication request of a user, and the authentication request comprises authentication feature data; generating authentication abstract data according to the authentication feature data; encoding the authentication abstract data according to an encoding mode agreed with a unified identity authentication platform to obtain encoded abstract data; obtaining mixed authentication summary data, wherein the mixed authentication summary data is obtained by encoding and mixing authentication summary data generated by the unified identity authentication platform for authentication feature data of a plurality of users in a user database according to the encoding mode; and if confirming that the coded abstract data is matched with the mixed authentication abstract data, confirming that the user passes the authentication. 本