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SECURE OFFLINE ACTIVATION PROCESS FOR LICENSED SOFTWARE APPLICATION PROGRAMS

  • US 20080301447A1
  • Filed: 06/01/2007
  • Published: 12/04/2008
  • Est. Priority Date: 06/01/2007
  • Status: Active Grant
First Claim
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1. A computer readable medium for activating a software application for execution on a designated computer, the computer readable medium having stored thereon computer executable instructions for performing the following steps:

  • (a) computing an installation identifier representative of the software application and the designated computer;

    (b) receiving an activation code generated in accordance with the installation identifier and a blinding factor value;

    (c) computing a reference value as a function of the installation identifier;

    (d) computing a decryption key as a function of the activation code and a trial blinding factor value;

    (e) using the decryption key to access an encrypted value representative of the installation identifier; and

    ,(f) comparing the encrypted value to the reference value.

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