WHAT DO WE MEAN BY
A credit card is a thin plastic card, usually 3-1/8
inches by 2-1/8 inches in size.
It contains identification information such as a
signature or picture.
It authorizes the person named on it to charge
purchases or services to his account -- charges
for which he will be billed periodically.
The information on the card is read by
automated teller machines (ATMs), store
readers, and bank and Internet computers
HOW CREDIT CARD
A user is issued a credit card after an account has been
approved by the credit provider (often a general bank, but
sometimes a captive bank created to issue a particular
brand of credit card, such as American Express
(Centurion Bank), with which he or she will be able to
make purchases from merchants accepting that credit
card up to a established credit limit
When a purchase is made, the credit card user agrees to
pay the card issuer. Originally the user would indicate
his/her consent to pay, by signing a receipt with a record
of the card details and indicating the amount to be paid,
but many merchants now accept verbal authorizations via
telephone and electronic authorization using the Internet
Electronic verification systems verify that the
card is valid and the credit card customer has
sufficient credit to cover the purchase in a few
seconds, allowing the verification to happen
(using a strip of magnetized material on the card
holding information in a similar manner to
magnetic or a floppy disk) to at time of purchase.
Other variations of verification systems are
used by e-Commerce merchants to determine if
the user's account is valid and able to accept the
Demerits of credit card
The information on a magnetic strip can be
read, altered or duplicated using a variety of
someone can see the account number and
name on our card.
Contact less technology
Credit card processing blink cards is an innovation designed
to make cashless consumer purchases faster, unique and
fun to do while boosting sales for retailers.
Instead of traditional credit card processing involving a
swipe of a card, increasingly perceived as taking too much
time by both consumers and retailers, all that’s required is a
quick wave of a card near a check stand reader to complete
How do we use blink
Once our purchases have been totaled , we
should hold our card up to the special reader at
Watch for the series of lights on the reader,
listen for the tone, and then remove your
Wait for transaction approval and you are
What is blink card
The new blink credit card is just like a regular credit card in
many ways . It has the account holder’s name and the
account number embossed on the front of the card.
On the back is a magnetic strip containing the account
information ,so the card can be used anywhere regular
credit cards can be used . The key difference is inside the
Embedded within the blink card is a small RFID(radio
frequency identification)microchip . When the chip is close
enough to the right kind of terminal ,the terminal can get
information from the chip– in this case account number and
So instead of swiping the magnetic strip on the card
through a standard credit-card reader ,card holders simply
hold their card a few inches from the blink terminal . The
card never leaves the card holder’s hand.
As with standard credit-card transactions ,the terminal then
sends the information via phone line to the bank that
issued the card and checks the account balance to see if
there is room on the card for the purpose.
If there is, the bank issues a confirmation number to the
terminal, the sale is approved and the card holder is on his
or her way.
Blink card and RFID
Credit card using blink technology uses a specific kind of
RFID developed under International standard 14443.
ISO 14443 has certain features that make it particularly well-
suited to applications involving sensitive information , such as
credit card account numbers:-----
Data transmitted by ISO 14443 chips is encrypted.
The transmission range is designed to be very short ,about 4
inches(10 cm) or less.
Instruction sets built into the processor encrypt the
data during transmission
As a result ,ISO 14443 is used in more than 80% of
contact less credit card transactions world wide
To understand how the contact less card and
terminal work together ,first we have to talk about
Induction now a blessing in blink
Each blink card contains a small microchip as well
as a wire loop .
The blink terminal gives off a magnetic field in the
area around it. When a blink card gets close
enough, the wire loop enters the terminal's field,
The voltage generated by the induction powers the
FIGURE OF BLINK TECHNOLOGY
Without this process, called inductive coupling,
each blink card would have to carry its own power
supply in the form of a battery
i. Which would add bulk and weight
ii. could eventually run out of power.
iii. As now the power is supplied by the terminal, the blink
system is known as a passive system
Once the blink card has power flowing to it from the
terminal, the processor then transmits information to
the terminal at a frequency of 13.56 MHz .
The encryption built into a blink card make this particular form
of theft impossible.
Using the blink card allows the user to keep the card in his or
her hand the entire time. This could prevent someone from
seeing the account number and name on the card.
A signature is not required when using a blink card, which leads
to security concerns.
Sending the credit-card data to a terminal via a radio signal is
much more Secure.
Never leave customers' hands, they also will solve the problem
of people driving away without their cards.
Eliminate the time customers spend waiting for cashiers to
Are completed up to 25% faster than those done with cash;
Can be up to 40% faster than other payment methods at
locations such as quick-service restaurants, drive-thrus and
Zero liability for fraudulent transactions.
The ability to track account details online at Chase.com.
No need to hand over the card to a cashier;
No risk of an accidental card reading because consumers
must hold the card within 1 to 2 inches of a reader to
conduct a transaction
Additional security measures
In some cases, if two or more terminals are close
together, not only both terminals read the card, but the
read range of each terminal increased to as much as 30
feet (9 m) .
some people are worried that they could accidentally
walk too close to a terminal and end up paying for
someone else's purchase
The simplest safeguard against this is probably
merchants positioning the terminals in such a way as to
make this unlikely.
Chase Bank's 'blink' technology allows
customers to wave a card in front of a
sensor instead of swiping or handing it to
Current News About Blink Tech.
Hawking adopts blink technology:-
PROFESSOR Stephen Hawking
is using a new gadget to communicate by
blinking - due to his deteriorating health.
The world famous physicist, 63, who is
Britain's longest surviving sufferer , has for
years used one hand to control the computer
system which operates his voice . But his
hand is getting weaker and he is now using a
new high-tech gadget, which allows him to
control the computer simply by blinking his
Consumers now use credit cards with blink to make
purchases just as often as they use cash credit card
use continues to grow .very soon it will be widely
The card readers have a built-in safeguard that
prevents more than one card from being read at a
time, and purchases above $25 require a signature as
an extra security measure.
Blink technology has future scope in mobile and