30. A method for using a computing device for controlling access to resources over a network, wherein the access includes one or more of perceiving, modifying, creating, adding to, or deleting a resource, comprising the steps of: (a) enabling one or more shared knowledge questions to be specified and specifying one or more acceptable answers to each shared knowledge question, where each shared knowledge question is associated with a first resource and is selected so that a specific group of one or more parties who are intended to be able to access the first resource are likely to have knowledge of an acceptable answer to the one or more shared knowledge questions; (b) using the computing device for enabling a party attempting to access a second resource that is controlled by a different entity than that controlling the first resource to enter a proposed answer to one or more of the shared knowledge questions that are associated with the first resource, the party attempting to access the second resource being a member of the specific group of parties intended to be able to access the first resource, thereby reusing the one or more shared knowledge questions to control access to the second resource; (c) using the computing device for determining if the one or more proposed answers that are entered by the party attempting to access the second resource are acceptable; and (i) if so, granting the party access to the second resource; else, (ii) if not, denying the party access to the second resource.
31. The method of claim 30 , further comprising the step of maintaining a storage that includes the one or more shared knowledge questions, wherein the storage is accessible over a network and the one or more shared knowledge questions included in the storage are associated with one or more specific parties who have accessed the first resource by entering acceptable answers to the one or more shared knowledge questions before the shared knowledge questions are reused to control access to the second resource, the party attempting to access the second resource being a member of the one or more specific parties who have successfully accessed the first resource.