Kevin Mitnick "Condor"

Kevin Mitnick spent the 1980s and early 1990s breaking into telephone companies and software firms — Nokia, Motorola, Sun Microsystems, Digital Equipment Corporation — almost entirely through what he later called the “human element”: phoning employees, impersonating colleagues, and talking his way past every authentication system in front of the data he wanted. He didn’t sell what he stole. He treated it as trophy collection. The FBI added him to its most-wanted list in 1992; he spent two and a half years on the run, was arrested in North Carolina in 1995, and served five years in federal prison, eight months of which were in solitary confinement because the prosecutor argued he could “start a nuclear war by whistling into a payphone”.

After release, Mitnick rebuilt himself as the credibility-by-confession founder of Mitnick Security Consulting, became KnowBe4’s Chief Hacking Officer, wrote bestselling books, and toured the conference circuit demonstrating the same social-engineering techniques he had used as a fugitive. The reformed-criminal arc landed cleanly because Mitnick was a uniquely articulate explainer of why technical controls fail when humans are the front door. He died of pancreatic cancer in July 2023, aged 59.

The lasting contribution: Mitnick made “social engineering” a board-level vocabulary item in enterprises that had previously thought of security as firewalls and antivirus. Every helpdesk-impersonation breach since 2010 — Robinhood, MGM, Marks & Spencer, Coinbase — descends from techniques Mitnick demonstrated three decades earlier.