The invention relates to an one-way access authentication method, which comprises (1) a second entity sends an authentication request and key distribution grouping to a first entity, the first entityverifies the validity of the message sent from the second entity, and if it is valid, conducting the next step; (2) the first entity generates authentication and key response grouping and sends to thesecond entity, which verifies the validity of the message sent from the first entity, and if it is valid, the second entity generates the authentication and key conformation grouping and sends to thefirst entity; and (3) when the first entity receives the authentication and key conformation grouping, the authentication succeeds and the key is the master key of agreement. The invention provides the identification mechanism-based one-way access authentication method, which is easy to implement, and can perform identification validity verification.