Each day we use our bank issued credit card. Swiping our cards on stores card readers to buy our purchases. Now, how it is that something so small can keep all your bank information. What allows the card reader to see that information? And what is that dark strip on the back of our cards.
The stripe on the back of a credit card is a magnetic stripe, or also called “Mag Stripe”. The magnetic strip is made up of tiny iron-based magnetic particles in a plastic-like film
The magnetic stripe can have data written because the tiny magnet bar can be magnetized in either a north or South Pole direction. The magnetic strip very similar to a cassette tape.
A magnetic stripe card reader can then understand the information that has been written on the three-track stripe.
With while direct Internet attachment uses much higher speeds via this protocol. Using Internet protocol, the cardholder enters their personal identification number using a pin pad.
The EM4200 card is not on the card -- it is encrypted in the database. Creation of your PIN can be interred in on the bank's computers in an encrypted form.
Also, the communications between the EM4200 card and the bank's central computer are encrypted to prevent would-be thieves from tapping into the phone lines, recording the signals sent to the to authorize the dispensing of cash and then feeding the same signals to the to trick it into unauthorized dispensing of cash.
If all of this isn't enough protection, there are now cards that utilize even more security measures than your conventional credit card: Smart Cards.
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