Kevin David Mitnick (born August 6, 1963) is an American computer security consultant, author, and hacker, best known for his high-profile 1995 arrest and five years later in prison for various computer and communications-related crimes. Mitnick's pursuit, arrest, trial, and sentence along with the associated journalism, books, and films were all controversial. He now runs the security firm Mitnick Security Consulting, LLC which helps test companies' security strengths, weaknesses, and potential loopholes. He is also the Chief Hacking Officer of the security awareness training company KnowBe4, as well as an active advisory board member at Zimperium, a firm that develops a mobile intrusion prevention system.