Blockchain-Based Vaccination Certificate Issuance System
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Solution Overview
Problem
Current methods for issuing and managing vaccination certificates are cumbersome, prone to personal information leakage, and lack convenience, especially in distinguishing vaccinated individuals from unvaccinated ones, particularly in highly contagious disease scenarios.
Innovation Solution
A system utilizing a trusted institution server, medical institution device, user device, and public distributed ledger to simplify certificate issuance and distribution, ensuring secure, reliable, and convenient verification of vaccination status without intermediaries, using digital signatures and verifiable credentials stored on a blockchain network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper certificate is used to certify vaccination status, then the certificate can be issued simply, but it is difficult to check authenticity and personal information leakage risk is high
Solution Approach 1:
The patent replaces physical paper certificates with digital copies stored on blockchain. The vaccination certificate is issued as digital data that can be verified through cryptographic proofs without exposing underlying personal information, thus maintaining issuance simplicity while enabling reliable verification through blockchain's immutable ledger and digital signature mechanisms.
Solution Approach 2:
The patent introduces a blockchain-based trusted institution as an intermediary that issues verifiable credentials. This intermediary enables authentication without direct exposure of personal information by using cryptographic proofs and zero-knowledge verification, resolving the contradiction between simple issuance and reliable verification.
2Reliability
If electronic certificates are issued by specific trusted institutions with user certification and payment procedures, then certificate authenticity is ensured, but the issuance procedure becomes complicated and inconvenient for users
Solution Approach 1:
The patent extracts the essential verification element (digital signature) from the complex issuance procedure. By using pre-issued vaccination agency verifiable credentials that contain digital signatures, the system eliminates the need for users to go through certification and payment procedures while maintaining certificate authenticity through blockchain verification.
Solution Approach 2:
The patent enables self-service issuance where medical institutions can directly issue vaccination certificates using pre-authenticated vaccination agency credentials stored on their devices. The blockchain network automatically verifies the credentials without requiring user participation in complex procedures, making the process convenient while ensuring authenticity.
3Ease of manufacture
If vaccination certificates are distributed in printed paper form, then they can be issued to users, but they cannot be easily reused and require repeated issuance and printing procedures
Solution Approach 1:
The patent replaces physical paper certificates with digital verifiable credentials that can be copied and transmitted electronically. The vaccination certificate exists as digital data on the user's device and can be shared instantly through secure communication channels without requiring re-issuance or re-printing, thus enabling easy reuse and improving efficiency.
4Ease of operation
If personal information is exposed in vaccination certificates for verification purposes, then authentication can be performed, but the risk of personal information leakage increases
Solution Approach 1:
The patent extracts only the essential verification information (vaccination status confirmation with digital signature) from the complete personal information set. The verifiable credential contains proof of vaccination without exposing sensitive personal data, and blockchain verification confirms authenticity without requiring exposure of underlying personal information.
Solution Approach 2:
The patent applies different levels of information disclosure to different parts of the verification process. The vaccination certificate contains minimal necessary information for verification, while the blockchain ledger contains the complete verification data. This local differentiation allows verification capability while minimizing personal information exposure in the circulated certificate.
Data Source
AI summary
The present disclosure relates to a method for vaccination management including at least: transmitting, by a medical institution device, a vaccination certificate issuance request, an identity certification verifiable credential (VC) for a user, a vaccination agency VC for a medical institution, and a digital signature of the medical institution, to a trusted institution server; verifying, by the trusted institution server, the vaccination agency VC based on a digital signature of a VC issuer included in the vaccination agency VC and the identifier of the trusted institution stored in a public distributed ledger; determining, by the trusted institution server, whether there is an authority for the vaccination certificate issuance request based on the vaccination agency VC and a medical institution database stored in the trusted institution server; and issuing, by the trusted institution server, a vaccination certification VC.