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Key management technique for establishing a secure channel

  • US 20050172137A1
  • Filed: 02/03/2004
  • Published: 08/04/2005
  • Est. Priority Date: 02/03/2004
  • Status: Active Grant
First Claim
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1. A method for establishing a secure channel through an indeterminate number of nodes in a network comprising:

  • enrolling a smart card with a unique key per smart card, the unique key derived from a private key that is assigned and distinctive to systems and a card base of a card issuer, an enrolled smart card containing a stored public entity-identifier and the secret unique key;

    transacting at a point of entry to the network, the transaction creating a PIN encryption key derived from the smart card unique key and a transaction identifier that uniquely identifies the point of entry and transaction sequence number;

    communicating the PIN encryption key point-to-point in encrypted form through a plurality of nodes in the network; and

    recovering the PIN at a card issuer server from the PIN encryption key using the card issuer private key.

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