cyber warfare
noun[U]
INTERNETukustheactivityof using theinternettoattacka country’scomputersinordertodamagethings such ascommunicationandtransportsystemsorwaterandelectricitysupplies:
The use of cyberwarfarecandestabilisefinancialsystems, thetelephonesystemor theenergygrid.
Cyberwarfarehasfundamentallychangednationalsecuritybecause anattackcan come fromanywhere.
See also
hacktivism