Information Management System Using Hash Values for Privacy
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Solution Overview
Problem
Existing information management systems for power storage devices fail to effectively protect personal user information while allowing its necessary utilization, particularly in systems where multiple users sequentially use the same device, leading to potential privacy risks.
Innovation Solution
An information management system utilizing a distributed ledger network that records management information including identification and hash values of power storage devices and users, allowing secure sharing of use history information while maintaining personal data privacy by hashing and encrypting sensitive information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If use history information of the power storage device for each user is provided to a service provider, then the service provider can easily provide a service suitable for each user, but the user's interest may be impaired due to personal information being shared by nodes
Solution Approach 1:
The patent introduces a hash value as an intermediary element between the use history information and the distributed ledger. The hash value serves as a mediator that allows the system to store and share reference information (hash values) without exposing the actual sensitive personal information, thus enabling service customization while protecting user privacy. The service provider can access use history information through the hash value mechanism without directly accessing raw personal data stored across nodes.
2Loss of information
If personal information of users is recorded in the distributed ledger, then the service provider can utilize the information for tailored services, but the information can be manipulated or accessed by multiple nodes
Solution Approach 1:
The patent extracts the sensitive personal information from the distributed ledger by storing only hash values of the use history information in the ledger. The actual personal information is kept separate and accessible only through the hash value mechanism, which prevents direct manipulation or unauthorized access to raw personal data while maintaining information availability for service provision.
3Loss of information
If a distributed ledger is used to manage power storage device information, then information sharing is enabled, but personal information can be accessed and shared by multiple nodes
Solution Approach 1:
The hash value acts as an intermediary that enables information sharing across multiple nodes without exposing personal information. The distributed ledger stores and shares hash values, which serve as references to the actual use history information. This mechanism allows legitimate information sharing for service provision while preventing privacy exposure, as the raw personal data is never stored or shared across the network nodes.
Data Source
AI summary
An information management system includes a data management device and a server. The data management device records the management information including the identification information of the power storage device, the identification information of the user using the power storage device, and the hash value of the use history information of the power storage device in the distributed ledger. The server is configured to be able to read management information. The server is configured to be able to acquire the use history information from the data management device. The server is configured to transmit the provision information based on the use history information in response to the transmission request. The provision information based on the use history information is information including at least one of use history information and information generated based on the use history information.