Purchase transaction system with encrypted payment card data
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United States of America Patent
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Oct 27, 2020
Grant Date -
Feb 20, 2014
app pub date -
Oct 22, 2013
filing date -
Jun 2, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Systems and methods are provided for securing payment card information. A user may present a payment card such as a credit card to point-of-sale equipment. The point-of-sale equipment may encrypt the payment card information. An encryption algorithm may be used that takes as inputs a first part of the payment card information, a tweak formed by a second part of the payment card information, and an encryption key. The encrypted payment card information may be conveyed to a gateway over a communications network. The gateway may identify which encryption algorithm was used in encrypting the payment card information and may re-encrypt the payment card information using a format preserving encryption algorithm. A network-based service may be used to remotely perform functions for the gateway.
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