Encryption is basically a form of Cryptography through which critical information is hidden by the use of codes or encryptions. Encryptions are normally used in ATM's, for passwords and electronic commerce. An ATM has a 3 by 5mm chip embedded in it which contains all the information about the account holder in encrypted algorithms and for retrieving the data and making use of ATM, one has to enter the password. To know more about how encryption works for ATM, see the link below:
en.wikipedia.org
en.wikipedia.org
