An article published in Virus Bulletin in September 2011 on Hearing a PIN Drop: a first shot at a continuing preoccupation with why people choose the PINs and passphrases they do. (It was subsequently the subject of a lengthy EICAR paper: PIN Holes: Numeric Passcodes and Mnemonic Strategies.)
David Harley, Hearing a PIN Drop, September 2011, Virus Bulletin. Copyright is held by Virus Bulletin Ltd, but is made available on this site for personal use free of charge by permission of Virus Bulletin.
David Harley CITP FBCS CISSP
Small Blue-Green World
ESET Senior Research Fellow