Electronic book selection and delivery system having encryption and security features

CAFC
  • US 7,299,501 B2
  • Filed: 09/28/2001
  • Issued: 11/20/2007
  • Est. Priority Date: 12/02/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for restricting access to electronic books displayed on a viewer, the method comprising:

  • storing an encrypted electronic book on a viewer, the electronic book having a plurality of pages;

    receiving a request to view the electronic book; and

    decrypting the pages for viewing on a page-by-page basis, including;

    retrieving a selected page;

    decrypting and displaying the selected page; and

    encrypting the selected page when no longer displayed.

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