Social network user identity authentication method based on relation statement

The invention discloses a social network user identity authentication method based on a relation statement, comprising the following three steps of: 1. issuing a relation statement; 2. defining an access rule; and 3. implementing relation authentication. A user determines the relation type between the user and a friend by issuing the relation statement to the direct-relation friend of the user; a relation server builds a relation path for the user according to the relation statement issued by the user; because each level of relation is signed by a relation statement publisher, the reliability of the level of relation can be effectively guaranteed so as to integrally improve the reliability of the relation path. The method is simple and convenient for operation and convenient for verification and has better practical value and wide application prospect in the technical field of network security.