A system of securing communications, comprising a plurality of computer peripheral resources, a beacon in signal communication with and located proximate each computer peripheral resource and configured to communicate using RF signals and ultrasound signals, and a portable device configured to request a listing of the computer peripheral resources using wireless network communication and to guide a user to a selected one of the computer peripheral resources using the RF and the ultrasound signals by way of the corresponding beacon, the portable device and the selected computer peripheral resource being configured to exchange encryption keys validated using signals from the beacon and to communicate with each other using encrypted network communication. Also provided is a communication system, comprising first and second portable devices respectively configured to use RF signals and ultrasound signals and to exchange encryption keys and to communicate with each other using encrypted network communication.