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Method and system for a virtual safe

  • US 6,941,285 B2
  • Filed: 10/11/2002
  • Issued: 09/06/2005
  • Est. Priority Date: 04/14/2000
  • Status: Expired due to Fees
First Claim
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1. A method of performing a secure electronic commerce transaction over a network using a smart card, said network having a client terminal, a merchant server, a payment server, and an authentication server, said smart card being a physical smart card or a virtual smart card, said smart card being associated with a user at said client terminal, said smart card having associated smart card information, said smart card information including an account balance, said smart card information being stored at said client terminal and at said authentication server, said method comprising the steps of:

  • sending a transaction request message from said client terminal to said merchant server identifying a product for said transaction, said product having associated product information, said product information being displayed on a first web page supported by said merchant server, said user being able to view said web page at said client terminal using a browser;

    said transaction request message being sent via a Transaction Fulfilment Mechanism (TFM) module consisting of a set of fraud management heuristics that are invoked in a progression that leads to a final fulfillment condition, said fulfillment condition dictating what type of delivery is to be made and associated criteria for completion of said transaction;

    sending transaction information from said merchant server to said client terminal in response to said transaction request message, said transaction information being contained in a second web page generated by said merchant server and displayable to said user through said browser, said transaction information including a price for said product, an IP address of said payment server, a transaction identifier, and a merchant identifier, said transaction identifier for tracking said transaction by said merchant server and by said payment server, said merchant identifier for tracking said transaction by said client terminal and said payment server;

    receiving a user identifier and a PIN from said user at said client terminal for authorizing said transaction;

    sending said user identifier, said PIN, and said transaction information from said client terminal to said authentication server;

    comparing said price of said product to said account balance for said smart card at said authentication server to determine if said transaction can proceed, said account balance being stored at said authentication server and being accessed using said user identifier and said PIN, said transaction being terminated and a first termination message being sent from said authentication server to said client terminal for display to said user if said price exceeds said account balance by a predetermined amount;

    sending a draw request message from said authentication server to said payment server using said IP address of said payment server, said draw request message containing said transaction information;

    sending said draw request message from said payment server to said client terminal;

    sending a debit request message from said client terminal to said payment server in response to said draw request message, said debit request message including a first digital signature, said first digital signature for verifying that said debit request message originated from said client terminal, said first digital signature being generated at said client terminal using said smart card information stored at said client terminal;

    sending said debit request message from said payment server to said authentication server;

    comparing at said authentication server said first digital signature contained in said debit request message to a first check digital signature generated at said authentication server using said smart card information stored at said authentication server to determine if said transaction can proceed, said transaction being terminated and a second termination message being sent from said authentication server to said client terminal for display to said user if said first digital signature does not match said first check digital signature;

    updating said smart card information by debiting said account balance by paid price to produce an updated account balance and storing said updated account balance at said authentication server;

    sending a debit response message from said authentication server to said payment server, said debit response message including a second digital signature, said second digital signature for verifying that said debit response message originated from said authentication server and for verifying that said account balance has been debited, said second digital signature being generated at said authentication server using said smart card information stored at said authentication server;

    sending said debit response message from said payment server to said client terminal;

    comparing at said client terminal said second digital signature contained in said debit response message to a second check digital signature generated at said client terminal using said smart card information stored at said client terminal, said smart card information stored at said client terminal including an expected updated account balance, to determine if said transaction can proceed, said transaction being terminated and a third termination message being displayed to said user if said second digital signature does not match said second check digital signature;

    updating said smart card information by debiting said account balance by paid price to produce an updated account balance and storing said updated account balance at said client terminal;

    sending a verification response message from said client terminal to said payment server, said verification response message including an indication that said second digital signature matches said second check digital signature and that said transaction can proceed;

    logging said indication and said transaction information at said payment server;

    sending a debit result message from said payment server to said authentication server, said debit result message for confirming that said transaction has been logged and that said transaction can proceed, said debit result message including said indication and said transaction information;

    logging said debit result message at said authentication server;

    sending said debit result message from said authentication server to said client terminal to confirm that said transaction has been logged and that said transaction can proceed;

    sending said debit result message from said client terminal to said merchant server to confirm that said transaction has been logged and that said product can be released to said user; and

    , sending a purchase receipt message from said merchant server to said client terminal, said purchase receipt message indicating that said product has been released to said user, thereby completing said secure electronic commerce transaction;

    wherein all of said transaction communications are routed through a secure component (Crypto Engine CEV) module which interconnects software modules and assures management of multi-identities, strong authentication, user consent, anonymity, accountability, reporting and privacy compliance.

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