Encrypted Content Access Control for Multi-User NFT Rentals
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Solution Overview
Problem
Conventional NFT rental systems face risks of NFT loss due to malicious behavior and allow only single user access, unsuitable for simultaneous use by multiple parties.
Innovation Solution
An information processing system that encrypts content with a private key, stores it in a decentralized storage, and uses smart contracts to manage usage rights, allowing multiple users to access content without transferring ownership, and includes an affiliate program for introduction fees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If NFT ownership is transferred to the assignee, then the assignee can access and use the content, but the assignee can arbitrarily transfer the content to another party and the owner loses control
Solution Approach 1:
The patent segments the NFT into two separate components: the content access rights and the ownership rights. The content is encrypted and stored separately from the NFT token itself. When an assignee receives the NFT, they gain access to decrypt and view the content, but the actual content file remains secured under the original owner's encryption key, preventing unauthorized redistribution
Solution Approach 2:
The patent introduces an intermediary encryption mechanism where the content is encrypted with a key that only the original owner possesses. This encryption layer acts as a mediator between the NFT transfer and content access, allowing the assignee to view content without being able to redistribute it, as the redistribution would require the owner's encryption key
2Reliability
If the content is encrypted and stored centrally, then security is improved, but the system complexity and storage cost increase
Solution Approach 1:
The patent extracts the content data from the blockchain NFT structure and stores it in external decentralized storage systems. The NFT on the blockchain only contains metadata and encryption references, while the actual content resides in IPFS or similar decentralized networks, reducing blockchain complexity and storage costs
Solution Approach 2:
The patent utilizes existing decentralized storage infrastructure (IPFS, Arweave, etc.) that the system does not need to build from scratch. These universal storage systems provide secure, distributed content hosting with built-in redundancy and security features, avoiding the need to develop a proprietary storage solution
3Reliability
If only single user access is allowed, then ownership control is simplified, but multiple users cannot simultaneously use the content
Solution Approach 1:
The patent implements dynamic access control where the NFT can be configured to allow multiple assignees with time-limited or purpose-specific access rights. The encryption key management system dynamically grants decryption capabilities to multiple users without transferring full ownership, enabling flexible multi-user scenarios such as rental markets or collaborative projects
Data Source
AI summary
The purpose of the present invention is to improve the convenience of managing rights related to content. An information processing system executes control allowing a client to use content linked to the smart contact on a blockchain while an owner retains ownership of the smart contact. A first control unit executes control to encrypt and store the content using a private key and also save a first key. A second control unit executes control to set content usage rights for a client who has satisfied an authorization to pay a rental fee. A third control unit, upon receiving a content usage request from the client, executes control to transmit the encrypted content to a media player to be operated by the client. A fourth control unit executes control to transmit, for example, a sub-key corresponding to the private key to the media player on the condition of confirming that the client has usage rights.