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Electronic Transaction Systems and Methods Therefor

  • US 20110004557A1
  • Filed: 12/21/2009
  • Published: 01/06/2011
  • Est. Priority Date: 12/04/1996
  • Status: Active Grant
First Claim
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1. In a portable electronic authorization device (PEAD) with inaccessible storage of a user'"'"'s private key, a method for approving a transaction request originating from an electronic transaction system, comprising:

  • receiving at said portable electronic authorization device first digital data, said first digital data representing said transaction request; and

    if said transaction request is approved by a user of said portable electronic authorization device, decrypting the user private key using a decryption key stored at and transmitted to the PEAD from a remote server, and transmitting a second digital data to said electronic transaction system, said second digital data being encrypted by said user private key but without transmission of the private key alone.

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