Who: Disgruntled employees, contractors, whistleblowers
Objectives: Score-settling, leaks, public good
Targets: Large companies, governments
Signature: Document theft
Classic Case: Maroochy Shire, an Australian district along the Sunshine Coast in Queensland, was inundated with millions of gallons of untreated sewage in 2001 when a contractor hacked and took control of 150 sewage pumping stations. He had been passed over for a job with the district. His dirty work cost Maroochy Shire upwards of $1 million.
Budget cuts loom for traditional military contractors - but electronic-security companies will flourish.