Communication terminal, portable terminal, circulating server, providing server, electronic book distributing method, and eletronic book distributing program

a technology of electronic book distribution and communication terminal, which is applied in the direction of electronic credentials, payment protocols, instruments, etc., can solve the problems of collecting royalties and sales fees, and achieve the effects of reducing waste of electronic value, avoiding fees, and enhancing convenien
US20070250455A1Inactive Publication Date: 2007-10-25NTT DOCOMO INC +2
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
NTT DOCOMO INC
Publication Date
2007-10-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

A portable terminal according to the present invention is provided with an electronic book coupon storage, a book data receiver, an electronic book coupon deductor, and a book data decryptor. The electronic book coupon storage stores an electronic book coupon used in acquisition of book data containing a plurality of page data units, along with a decryption key used in decryption of the plurality of page data units. The book data receiver receives the book data from an electronic book providing server. The electronic book coupon deductor deducts an electronic worth equivalent to a price according to page data requested to be read out, from the electronic book coupon. The book data decryptor decrypts the page data in steps of one page data unit by use of the decryption key in conjunction with the deduction of the electronic worth.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is a divisional of U.S. application Ser. No. 10 / 441,162 filed on May 20, 2003, which claims priority to Japanese Patent Application No. 2002-145037 filed on May 20, 2002 and Japanese Patent Application No. 2002-145045 filed on May 20, 2002. The contents of each of these documents are incorporated herein by reference.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a communication terminal, a portable terminal, a circulating server, a providing server, an electronic book distributing method, and an electronic book distributing program.

[0004] 2. Related Background Art

[0005] In recent years, electronic books (also called e-books (trademark)), which are superior in portability and searchability to books of paper media and which can contain records of sound, are in practical use. The electronic books are digitized books which can be purchased and read by use of such termi...

Claims

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