Why do credit cards have a magnetic stripe at the back?
What reader reads the magnetic stripe on the back of credit cards entertainment cards bank cards and other similar cards?
The magnetic strips on the back of bank cards and credit cards can be affected by strong magnetic fields or being close to weak magnetic fields. When you keep credits cards in a wallet with magnetic strip touching or being very close together, it is possible for the magnetic strips to affect each making them unreadable. Even so, the credit cards can still be used by manually keying in the credit card number.
"In today's modern world of technology, magnetic encoding has revolutionized the safe and reliable transfer of personal credit card data. However, once the magnetic strip has been damaged on the back of a credit card it will no longer work properly. The only solution is to replace it with a new card."
There are no magnets in credit cards. If you're referring to the 'magnetic strip' on the back of the card - it's a secondary system of identifying the card. When you insert your card into an ATM - the machine reads the magnetic strip which connects it to the account-holder's bank. Contrary to popular belief - it does not contain the PIN associated with the card.
The strip on the back of your credit card is made up of magnetic particles that contain the account information. Any contact with a magnet or magnetic field can cause the strip to become demagnetized and the card to be ruined. Exposure to magnets can cause the particles in the strip to rearrange, making the card unreadable. Read more: Why Do Magnets Ruin Credit Cards? | eHow.com http://www.ehow.com/about_5365431_do-magnets-ruin-credit-cards.html#ixzz1Odckj7cS
The security code is not only on the back of the card. Example: American Express puts it on the front. The basic concept is simple. This number is only phisical.... meaning that it is not also encoded on the credit card magnetic stripe. The result is, that if you know and can provide this code, you have the physical card in your possesion.
Subsidiary credit cards are viable credit cards issued under the direction of a major credit card company. For example, the American Express Company issues several different types of credit cards. They have cards that give you cash back, cards that give you points to purchase other items, and cards that earn airline travel miles. Each one of these types of cards are subsidiary credit cards.
Companies that offer cash back credit cards tend to have information about the cards on their websites. There are also several sites that offer comparisons of particular cards on offer, and the best uses to put them to. Cash back cards also feature in traditional news media articles for those that may want a more conventional viewpoint.
The stripe is effectively a small strip of magnetic recording tape. It contains 3 tracks of digital data. track 1 uses a 6 bit alphanumeric character code with parity and contains information for use by the card issuer track 2 uses a 4 bit numeric character code with parity and contains information for use by the banking industry track 3 has almost never been used and is not even present on cards with narrower stripes