This credit is often attributed to John Shepherd-Barron (who invented the first true electronic ATM) and Donald Wetzel (who directed a 5 million US-$ project to build upon Shepherd-Barron's invention in the late 1960s).
The concept of a PIN originates with the inventor of the ATM, John Shepherd-Barron.
John Shepherd-Barron (born 1925), inventor and developer of the cash machine or ATM
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There were a couple of minor bright spots only: he hit a fighting 36 not out as part of an unbroken last-wicket stand of 58 with Norman Gifford (30*) against Gloucestershire, and he also took the first of only two career one-day wickets when he dismissed Kent's John Shepherd in June.
Their son, John Shepherd-Barron became the inventor who pioneered the development of the Automated Teller Machine (ATM).
In 1905, Chaffey purchased the ranch of John Shepherd at Manzanar, California, located in California's Owens Valley.
Second (Copyright) Edition of the Monmouthshire Melodist and Supplement: A Work containing original Pieces, suitable for Chapel and Sunday School Anniversaries; Also, a Variety of Chants, Tunes, &c. by Various Authors, Especially adapted for Congregational Use; The whole Edited and Arranged for the Organ, Pianoforte, &c., by the late Joseph Nicholds. (Birmingham: George Sage, and London: John Shepherd, supplement published Bristol: Henry Keeler, c.1869).
Nicholas Shepherd-Barron (born 1955), mathematician; son of John Shepherd-Barron