Digital Trust Redefined: Blockchain-Based Notarization System Using Eid Card

Abstract

In the postmodern era, ensuring trust in electronic transactions is fundamental, especially for notarization and document verification. Traditional notarization systems rely on centralized authorities and are susceptible to forgery, data leaks, and unauthorized manipulations. This paper proposes a blockchain-based notarization system incorporating electronic identity (eID) cards to facilitate secure, immutable, and irrevocable record authentication. The eID card serves as an advanced verification tool, allowing users to securely sign and notarize documents with cryptographic verification. The notarization process involves hashing the document, storing the hash on a decentralized blockchain ledger, and linking it to the user's eID-based digital signature. Any change to the document renders the notarization invalid, preventing fraud and unauthorized alterations. A decentralized verification mechanism enables authorized entities, such as government agencies, banks, and legal institutions, to verify notarized documents without relying on a single central authority. The system integrates Inter Planetary File System (IPFS) or similar secure storage solutions to store document copies off-chain, leaving only cryptographic proofs on the blockchain to balance security and efficiency. This blockchain-based notarization system provides enhanced security, transparency, and reduced operational costs compared to traditional approaches. It eliminates intermediaries, reduces processing time, and provides irrefutable proof of authenticity. The system is applicable to various use cases, including legal contracts, property deeds, and educational certificates, ensuring tamper-proof notarization.