System for blockchain-based certificates

Blockchain-based certificate system protecting personal information through off-chain and on-chain separation

This technology is a blockchain-based certificate system where an issuer device issues a certificate containing a digital signature upon a user terminal's request. Issuance information is stored off-chain, while select data is synchronized on-chain, allowing service provider terminals to verify certificates via the blockchain.

Existing certificate management methods face challenges in verifying authenticity and preventing tampering, while also posing privacy risks as users' personal information contained in certificates is exposed directly on the blockchain.

By storing sensitive information such as personal data off-chain and synchronizing only the information necessary for verification on-chain, this technology can be applied to various electronic certification services, such as infectious disease prevention certificates, to verify authenticity while protecting personal privacy.

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Key Features:

• An issuer device that issues a certificate containing a digital signature in response to a certificate issuance request from a user terminal and stores issuance-related information off-chain.
• A user terminal that provides a certificate containing the user's digital signature to a service provider terminal via wireless communication for verification.
• A service provider terminal that verifies the certificate received from the user terminal via wireless communication through the blockchain.
• A configuration in which at least a portion of the certificate issuance-related information stored off-chain is synchronized and stored on-chain.

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The fixed price for this patent is 1 billion KRW, though the price is negotiable based on the terms of purchase.

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