Purchase transaction system with encrypted transaction information
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United States of America Patent
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Jul 11, 2017
Grant Date -
Nov 18, 2010
app pub date -
May 15, 2009
filing date -
May 15, 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 use a symmetric key to encrypt payment card information associated with the payment card. The symmetric key may be encrypted at the point-of-sale equipment using the identity-based-encryption (IBE) public key of a purchase transaction processor to produce a key transfer block. The key transfer block and the encrypted payment card information may be conveyed from the point-of-sale equipment to the purchase transaction processor over a communications network. At the purchase transaction processor, an IBE private key may be used to recover the symmetric key from the key transfer block. The symmetric key can be used to decrypt the encrypted payment card information for processing and re-encryption using a key associated with the purchase transaction processor.
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