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Download Method of distributing piracy protected computer software
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U.S. Patent Apr. 13, 2004 Sheet 1 0f 10 US 6,721,891 B1 10 / E /30 Figure 1a 40 COMPUTER SMARTCARD Execute Software Application Require Key from ———> Receive Request for Key Smartcard Receive Key from Smartcard Prompt User l 4 Provide Key to Computer Key for Correct 4-No Correct? Smartcard Yes v Continue Execution Figure 1b
