A method, computer readable media, and system for providing a first network resource with secure but limited access to a second network resource. A method embodiment of the invention includes associating a check with data identifying an expected source of a future request to access the second resource. Later, the first resource requests access to the second resource. Included in the request is a check signed with data identifying the first resource. The request is received and the check is authenticated. The request is granted only if the check is authentic and the data used to sign the check matches the expected source associated with the check.