Methods and apparatus provide resource authorization based on a computer's presence information. Presence information may include information relating to a computer's operating environment. In some implementations, a presence detector on a computer determines presence information and provides the information to a resource manager. The computer may then generate a resource access request. A resource manager may then determine whether the resource request is authorized based, at least in part, on the presence information. The resource manager then responds to the resource access request, either granting or denying the request for resources.