Shared State Equivalence definition in Computer Security terms:
Definition(s): Shared state equivalence means that the EAP peer and server must share state attributes associated with the EAP method, including the method version number, the credentials provided and accepted, and any other negotiated method-specific state attributes. Both parties must be able to distinguish one instance of the method from another.
Source(s): NIST SP 800-97
reference: CSRC Glossary