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Secure authentication for authorization for transaction processing

  • US 8,095,965 B2
  • Filed: 01/29/2009
  • Issued: 01/10/2012
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Fees
First Claim
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1. A method of processing a query sent from a client system comprising the steps of:

  • using a processor to;

    access said query comprising user identification data, said query further comprising an unencrypted portion comprising unencrypted data and an encrypted portion comprising an encrypted buffer encrypted using a first encryption key, said encrypted buffer also encrypted using a second encryption key;

    obtain said second encryption key;

    decrypt at least a portion of said encrypted portion using said second encryption key;

    decrypt said encrypted buffer using said first encryption key;

    determine authentication by comparing said user identification data to user identification data contained within said encrypted buffer;

    determine authorization to use a service requested in said query based on information indicating services accessible by said user contained within said encrypted buffer if said user identification data matches user identification data contained within said encrypted buffer; and

    generate and transmit to said client system an error message if said user identification data does not match said user identification data contained within said encrypted buffer.

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