1. A method for securing resources, comprising: on an access-control computing device, receiving a request from a requesting user's computing device to access an access-controlled resource, the requesting user not having permission to access the access-controlled resource; on the access-control computing device, compiling an approver list of one or more approvers having authority to grant access to the access-controlled resource; on the access-control computing device, determining a suitability of each of the one or more approvers to respond to a resource access request based on a relationship between the requesting user and each of the one or more approvers, and a current ability of each of the one or more approvers to communicate with the requesting user; on the access-control computing device, filtering the approver list to include only suitable approvers; on the access-control computing device, sending the filtered approver list to the requesting user's computing device; on the access-control computing device, receiving an indication of a preferred approver from the requesting user's computing device, the preferred approver being selected by the requesting user from the filtered approver list; on the access-control computing device, sending a resource access request to a computing device of the preferred approver; on the access-control computing device, receiving a response from the computing device of the preferred approver; and on the access-control computing device, based on the response approving the resource access request, granting access to the access-controlled resource.