Verifiable Review Sharing Using Signed User Attribute Credentials

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Solution Overview

Problem

Existing information sharing services struggle to efficiently collect and verify high-quality reviews and opinions, as they often lack credibility verification and are prone to review falsification, making it difficult to maintain reliability and user trust.

Innovation Solution

An information management system utilizing a decentralized identity infrastructure (DID) to issue verifiable credentials (VC) to users, verifying their attributes through signature information, and ensuring that only credible reviews are aggregated and displayed, thereby enhancing the credibility of the review process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional information sharing services collect reviews without verification, then the quantity of reviews increases, but the reliability and credibility of the information decreases

Engineering Contradiction:

Improvereliability of reviewsVSAvoidcomplexity of verification system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system performs preliminary verification of user attributes before allowing review submission. Attribute information including signature information is verified in advance to confirm the user's identity and qualifications, ensuring that only authenticated users can post reviews. This preliminary action prevents unverified reviews from entering the system, thereby maintaining reliability without requiring complex post-verification mechanisms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Users are required to possess and present their own attribute information with signature information that proves their identity. The verification process leverages the user's own credentials (digital signatures, certificates) to authenticate them, rather than requiring the system to perform complex background checks. This self-service approach to verification maintains reliability while keeping the system relatively simple.

Inventive Principle:

Principle #25Self-service

2Reliability

If the system verifies attribute information with signature information, then the credibility of reviews improves, but the processing time increases

Engineering Contradiction:

Improvecredibility of review processVSAvoidtime for verification

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Attribute information and signature information are verified before review submission takes place. This preliminary verification ensures that credibility checks are completed in advance, so that when reviews are posted, their credibility is already established. The time cost of verification is incurred once during the authentication phase rather than repeatedly for each review interaction.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system replaces manual or complex mechanical verification processes with cryptographic signature verification. Digital signatures and cryptographic protocols enable automated, efficient verification of user attributes without requiring human review or complex procedural steps. This substitution significantly reduces verification time while maintaining high credibility standards.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If the system requires attribute information with signature information from users, then the integrity of information sharing is maintained, but the ease of operation decreases

Engineering Contradiction:

Improveintegrity of information sharingVSAvoidease of posting reviews

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The attribute information system serves multiple functions simultaneously: it authenticates user identity, verifies user qualifications, enables cryptographic signing of reviews, and provides a basis for credibility assessment. By making the attribute information structure universal and multi-functional, the system maintains integrity through a single unified mechanism rather than requiring separate processes for each function, thereby preserving ease of operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Users manage their own attribute information and signature credentials, presenting them when needed for verification. The system does not need to actively collect or manage detailed user information, but rather verifies the credentials that users already possess. This self-service model maintains integrity through user-owned credentials while keeping the interaction simple and straightforward for users.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12574391B2Computer-readable recording medium storing information management program, information management method, information processing device, and information sharing system

Publication Date: 2026.03.10 FUJITSU LTD

AI summary

A non-transitory computer-readable recording medium storing an information management program for causing a computer to execute processing including: receiving distribution information obtained by attaching, to distribution content to be distributed by a user, attribute information on the user that includes signature information that is signed by an issuing authority that issues information regarding an attribute of the user and that proves that the issuing authority has issued the attribute information; verifying whether the attribute information on the user included in the distribution information is the attribute information issued by the issuing authority, by using the signature information; and outputting the distribution content, based on a verification result.