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KR-20260062524-A - Blockchain-Based Decentralized DRM Content Distribution and Trading Method

KR20260062524AKR 20260062524 AKR20260062524 AKR 20260062524AKR-20260062524-A

Abstract

The present disclosure provides a structure for a blockchain-based decentralized DRM content trading system. The system is broadly composed of a service unit and a blockchain unit, and utilizes HE to remove the keys of existing content holders and re-encrypt them with the keys of new users, thereby enabling the public management of DRM content based on a decentralized blockchain.

Inventors

  • 최종석

Assignees

  • 주식회사 바이야드

Dates

Publication Date
20260507
Application Date
20241029

Claims (5)

  1. With a blockchain-based DRM content transaction structure, A system composed of a blockchain division and a service division, where all or part of the blockchain division can be based on code on the blockchain.
  2. In paragraph 1, A system for HE key restoration to manage HE keys.
  3. In paragraph 2, A system for HE key restoration to manage HE keys by relying on the DMPC management department.
  4. In paragraph 1, A system for trading DRM content by re-encrypting content using HE keys.
  5. In paragraph 1, A system that trades by utilizing the user's HE key to remove the user key from user DRM content.

Description

Blockchain-Based Decentralized DRM Content Distribution and Trading Method The present invention relates to a content management system utilizing blockchain, and more specifically, to a technology for performing encryption, decryption, license management, and key distribution of content. Specifically, it provides a modular system for enhancing content security and resolving centralized vulnerabilities. Encryption is essential for digital content to prevent piracy and leakage. However, existing systems store encryption keys and license information on centralized servers, which can lead to security threats. In particular, if network latency or system errors occur during the process of managing content access rights, users may be unable to access content they have legitimately purchased. The present invention solves the problems of existing systems by utilizing blockchain technology to manage keys and licenses in a distributed manner, and enables flexible and secure content transmission and management. FIG. 1 is a diagram illustrating how a blockchain unit and a service unit interact during content trading in various embodiments of the present disclosure. Hereinafter, specific details for implementing the present disclosure will be described in detail with reference to the attached drawings. However, in the following description, specific descriptions regarding widely known functions or configurations will be omitted if there is a risk that the gist of the present disclosure may be unnecessarily obscured. In the attached drawings, identical or corresponding components are assigned the same reference numerals. Additionally, in the description of the following embodiments, the description of identical or corresponding components may be omitted. However, even if a description of a component is omitted, it is not intended that such component is not included in any embodiment. In this disclosure, all or part of the service portion may be composed of smart contracts on a blockchain, and the terms private blockchain and public blockchain are used interchangeably as blockchain networks for the service portion. FIG. 1 is a drawing illustrating a digital content transaction of the present disclosure. As described, the blockchain section (100) refers to a part of the system of the digital content marketplace, and all or part of it may be composed of smart contracts on the blockchain service. The service section (200) is a service that operates on a first terminal using the digital content marketplace. The DMPC (Decentralized MPC) management unit (110) refers to an MPC operated by two or more entities and manages information encrypted to be used to restore the HE (Homomorphic encryption) key. The HE key restoration unit (120) decrypts the HE key restoration information using the key received from the DMPC management unit (110) to generate an HE key. The content transaction unit (130) performs re-encryption on the content using the key received from the HE key restoration unit (12). The user wallet management unit (210) restores HE key information using a private key, performs content decryption through the HE key restoration unit (220) and HE decryption unit (240), and trades the content using the content transmission and reception unit (230).