Oh boy. Don’t let your boss see this.
It may sound slightly far-fetched. But a penetration tester from NTA Monitor, a company based in Rochester, England, gained access to a professional services company outside London that way, said Roy Hills, technical director.
The company hired NTA to test if it was possible to get inside the premises without proper identification, Hills said. The penetration tester waited until the smokers finished their break, then slipped in through the unlocked door, which wasn’t the main one but publicly accessible.
http://www.infoworld.com/article/07/02/16/HNsmokersweaklink_1.html?source=NLC-TB&cgd=2007-02-16