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[February 21st, 2001]
The protracted demise of the Secure Electronic Transaction protocol
(otherwise known as SET) is now complete. Designed to bolster fraud
prevention on Internet credit card transactions, SET was beleaguered by
complexities that made full implementation untenable.
Still, with the laborious passing of SET, new and improved approaches to
securing online transactions are visible on the horizon. And many of these
security protocols will provide the degree of consumer authentication needed
to decrease problematic fraud and chargeback levels - very good news for
online merchants.
Good news indeed, principally because the current SSL (Secure Sockets Layer)
protocol was not designed to protect online business from fraudulent use of
stolen credit cards. Though SSL provides very important encryption for
credit card data - and a secure medium of transmission - consumer
authentication on card-not-present transactions is not part of the SSL
protocol. Similarly, SSL does not insulate credit card data on merchant
servers. Unfortunately, short of deploying elaborate fraud detection systems
(that attempt to flush out suspect ordering activity), cardholder
authentication remains a major e-commerce snag - at least for the moment.
Designed to remedy security problems, SET was developed in 1996. However,
the technical and bandwidth requirements of SET, as well as mounting
complexities involved in full realization, created a situation in which
SET's disadvantages outweighed it's potential benefits.
Currently, there are a number secure transaction models competing to replace
SET, and each concentrates on more comprehensive protocols for
authenticating customers during card-not-present transactions. In all cases,
more data is required from the consumer than the current inadequate standard
of credit card number combined with expiration date. Most importantly for
online merchants, more and more liability for chargebacks will fall on the
consumer, which should radically decrease abuse of 'consumer-friendly'
credit card policies.
First, there is the Payer Authorization model in which the credit card
company issues a password or PIN number to the cardholder to be used during
card-not-present transactions. During a sale, a pre-authorization process
requires that your customers enter a password along with the credit card
number. The merchant is then notified of consumer authenticity - or
potential fraud. If the card issuer verifies the password, the merchant
transmits an authorization message and the pre-authorization process is
concluded successfully.
American Express' 'Private Payments' model for secure transactions operates
on the same principle as the Payer Authorization model - except for one key
difference: for each online transaction the consumer must go to the American
Express website to receive a 'disposable' transaction number to be used in
conjunction with the credit card number. The transaction number can only be
used once and is rendered inoperative after a transaction is made. To
receive the transaction number in the first place, the cardholder must
provide a user name and password at the Private Payments site.
The last model, the Visa Smart Card program, basically strives to emulate
the 'swipe' of physical point-of-sale transactions combined with PIN number
security. For these transactions, the card issuer must issue 'smart' credit
cards loaded with microchips that can authenticate user identity. Of course,
the consumer will also have to have a terminal connected to his/her PC in
which to swipe the card. A PIN number then activates the credit card data
locked in the smart card microchip.
Because each of these models require passwords or PIN numbers, all provide
relatively strong anti-fraud protection in cases where credit card numbers
are stolen or hacked en masse. As a result, these security developments
should go a long way in improving consumer confidence in the Internet as a
viable, secure environment for transacting business.
Of perhaps greater significance to online merchants, the authentication
protocols require more consumer data than current systems and the capacity
to confirm cardholder identity is greatly enhanced. This means less fraud
exposure and one very significant ancillary benefit: more and more
chargeback liability will rest with the consumer - and this is very good
news for those e-businesses suffering from damaging chargeback fees and
exorbitant fraud levels.
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