
1) Computer access control 2) Cryptographic attack
Found on
https://www.crosswordclues.com/clue/stuxnet

Stuxnet is a computer worm that was discovered in June 2010. It was designed to attack industrial Programmable Logic Controllers or PLCs. PLCs allow the automation of electromechanical processes such as those used to control machinery on factory assembly lines, amusement rides, or centrifuges for separating nuclear material. Exploiting four zero-d...
Found on
http://en.wikipedia.org/wiki/Stuxnet
No exact match found.