Mark Rifkin
A computer-repair consultant in the 1970's, Mark Rifkin visited Security Pacific bank's wire transfer room in 1978 and memorized the daily transfer security code.
Later in the day he called the bank's transfer department posing as an employee in an international division; using the transfer code he had $10.2 million wired to a private account in Switzerland.
In a sufficiently large company, posing as a fellow employee in need of some assistance is a common social engineering ploy.
