US Patent:
20100318468, Dec 16, 2010
Inventors:
Robert O. Carr - New London NH, US
Steve Elefant - Lafayette CA, US
Sarah McCrary - Addison TX, US
Paul Minutillo - Allen TX, US
International Classification:
G06Q 20/00
Abstract:
An electronic payment transaction involves operating a gateway device in an electronic payment system to receive first encrypted transaction data from a merchant device, wherein the first encrypted transaction data is encrypted by means of a merchant device-specific encrypting key. Decrypted transaction data is produced by using a merchant device-specific decrypting key to decrypt the first encrypted transaction data. Second encrypted transaction data is derived from the decrypted transaction data, wherein the second encrypted transaction data is encrypted by means of a gateway device-specific encrypting key. The gateway device communicates the second encrypted transaction data to another electronic payment system server. A key transmission block received from the merchant device includes information that enables the gateway device to derive the merchant device-specific decryption key.