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Electronic transaction systems and methods therefor

  • US 8,016,189 B2
  • Filed: 12/21/2009
  • Issued: 09/13/2011
  • Est. Priority Date: 12/04/1996
  • Status: Expired due to Fees
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

    in response to receiving approval of said transaction request by a user of said portable electronic authorization device, decrypting the user private key that is inaccessibly stored by the PEAD 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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