Systems security

There are three parts to systems security: (1) Computer Security (COMPUSec) is composed of measures and controls that protect an AIS against denialofservice, unauthorized disclosure, modification, or destruction of AIS and data (information). (2) Communications Security (COMSec) is measures and controls taken to deny unauthorized persons information derived from telecommunications of the U. S. government. Government communications regularly travel by computer networks, telephone systems, and radio calls. (3) Information Systems Security (INFOSec) is controls and measures taken to protect telecommunications systems, automated information systems, and the information they process, transmit, and store.