Cracking safes with thermal imaging
`In short, virtually all keypad entry systems – as used in various applications, including building access control, alarm system control, electronic lock safes, ATM input, etc – are susceptible to a trivial low-profile passphrase snooping scheme. This attack enables the attacker to quickly and unobtrusively recover previously entered passphrases with a high degree of success. This is in contrast to previously documented methods of keypad snooping; these methods were in general either highly intrusive – required close presence or installation of specialized hardware – or difficult to carry out and not very reliable (e.g., examining deposited fingerprints – works in low-use situations only, and does not reveal the ordering of digits).’
