Title:
DIGITAL PRODUCT DISTRIBUTION METHOD AND DIGITAL PRODUCT DISTRIBUTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/209463
Kind Code:
A2
Abstract:
The present invention provides a method and a system for distributing a digital product. According to an aspect of the present invention, there is provided a digital product distribution method comprising a registration step, a purchase step, and a consumption step. The registration step comprises the steps of: acquiring, from a product provider system, an encrypted product obtained by encrypting a predetermined digital product with a symmetric key corresponding to the digital product, and at least one attribute-based encrypted file corresponding to the digital product; and storing the at least one attribute-based encrypted file corresponding to the digital product in a key repository. The purchase step comprises the steps of: decrypting, when a purchaser has purchased the digital product, a decryptable encrypted file, which can be decrypted by a license attribute included in an attribute-based encryption policy corresponding to purchase information of the digital product, by using the license attribute included in the attribute-based encryption policy corresponding to the purchase information of the digital product, and issuing a purchase license regarding the digital product of the purchaser on the basis of the purchase information of the digital product of the purchaser; encrypting the symmetric key corresponding to the digital product with an attribute key corresponding to the license attribute included in the purchase license, thereby acquiring an attribute-based encrypted file corresponding to the purchaser; and storing the attribute-based encrypted file corresponding to the purchaser in the key repository. The consumption step comprises the steps of: decrypting the attribute-based encrypted file corresponding to the purchaser by using the license attribute included in the purchase license, thereby acquiring the symmetric key corresponding to the digital product; acquiring the encrypted product corresponding to the digital product; and converting the encrypted product corresponding to the digital product into a transmittable product by using the symmetric key corresponding to the digital product, and providing same to the purchaser's terminal.
Inventors:
KIM TAI HYO (KR)
Application Number:
PCT/KR2019/016288
Publication Date:
October 15, 2020
Filing Date:
November 25, 2019
Export Citation:
Assignee:
FORMAL WORKS INC (KR)
International Classes:
G06Q30/06; G06Q20/12; G06Q20/38
Attorney, Agent or Firm:
SHIM, Choong Sup (KR)
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