3. INTRODUCTION
A magnetic stripe card is a card (e.g., a credit card) that contains a stripe of
magnetically-encoded data.
These cards are paired with readers and writers.
Used in a wide variety of applications for storing information.
Sometimes called “swipe card”.
5. USAGE
Most identification, credit, automated teller machine, and membership cards
have a thin magnetic stripe across one side of the card.
By "swiping" the card through or inserting the card into a reader, a computer can
read the data on the stripe.
Magnetic stripes make card usage much less prone to error because the data
are not entered manually.
The stripes can also contain encrypted information and information not printed
on the card which can only be created or read by specialized computers.
7. Technology:-
The magnetic stripe is actually an area of dense microscopic bar magnets, of which there
are approximately 200 million per square inch.
The magnets can be used to encode the data in an infinite number of ways.
Like larger bar magnets, one end of each microscopic magnet is a north pole (N) and the
other a south pole (S).
In an empty, horizontal stripe, all of the bars are aligned left to right so that the north poles
are facing one direction and the south poles the other.
A magnetic stripe reader has a head, much like the one in an audio tape player, which can
detect that field.
The reader converts the analog signal into a digital one by turning positive peaks into
transitions from low to high and negative peaks into transitions from high to low.
Finally, the reader measures the length of each high/low pair.
8. Technology:-
The difficulty in this system is that it depends on the reader measuring the distance
between the peaks.
The card is usually swiped through the reader by a person's hand, and it is difficult or
impossible to regulate the specific speed at which the card should be swiped.
At a low speed, a single high/low pair will look longer than it actually is.
At a high speed, the same pair will look shorter.
9. Art Work Set-up
● Magnetic strip size:
85* 12.55 mm
● Position:
4.5mm from top of card
10. Varieties:-
● High Coercivity(Hi-Co):-
Harder to erase.
Frequently used.
Long life.
Black in colour.
● Low Coercivity(Lo-Co):-
Require lower amount of magnetic energy.
Brown in colour.
Easily damaged.
13. BENEFITS:-
● More Secure as not in human readable format
● Immune to dirt,water,oil ,moisture,etc.
● Data can be customized and rewritten.
● High data capability on subject of bar code.
● Well known standards.
