Authentication on the basis of RDF

I investigate to implement a schema of Authentication (identify). A user
attempts to act a network resource, at first it must to complete a
authentication process, which determines how it acts the resource, i.e.
under which rights (read, write,etc.) it can act. (role based).

I implement the model on the basis of RDF. Is there a published
RDF-vocabulary attended to my purpose?

I appreciate any pointer.

Thanks,

Eshaghi