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Decentralized Self-Sovereign Identity Using Blockchain for Enhanced Privacy and Security

A blockchain-based self-sovereign identity system empowering users with control over digital identities, reducing fraud, and enabling secure, privacy-preserving verifiable credentials across sectors like government, finance, and healthcare.

Technology◦
TITLE PAGE SMART INDIA HACKATHON 2025 • Problem Statement ID – 25127 • Problem Statement Title- Student Innovation • Theme - Blockchain & Cybersecurity • PS Category- Software • Team ID- • Team Name - Innospark
IDEA TITLE Self-Sovereign Identity: User-Controlled Digital Identity • Traditional digital identity systems are centralized, vulnerable to hacks and data misuse • Users have no direct control over their personal data • Repeated KYC/identity verification needed across services and sectors • Lack of privacy, data breaches, and identity theft issue • Proposed Solution • Decentralized SSI framework empowering users with full control over identities • Blockchain-based system for secure, tamper-proof verifiable credentials • Single digital wallet for managing identity proofs and sharing selectively • Eliminates intermediaries; reduces fraud and data duplication 2 @SIH Idea submission- Template Innospark
TECHNICALAPPROACH • Blockchain platform (e.g. Ethereum, Hyperledger) to store DIDs and public keys • Use of W3C standards: Decentralized Identifiers (DID) and Verifiable Credentials (VC) • Digital wallets for users to hold and present credentials securely • Smart contracts to automate verification and revocation processes • Process flow: Issuer → Holder → Verifier using blockchain registry 3 @SIH Idea submission- Template Innospark issuer holder​ Verifier using blockchain registry
FEASIBILITY AND VIABILITY o Feasibility o Blockchain is secure & tamper – proof reliable for identity. o Open standards (DID , verifiable credentials ) already exist. o Works with mobile wallets easy adoption. o Viability o Reduces identity fraud & data leaks. o Gives users full control privacy friendly. o Scalable for govt., banks, education & healthcare. o Long term cost saving vs. Central databases. 4 @SIH Idea submission- Template Innospark [Blockchain Technology] ↓ [Secure & Tamper-proof] → [Open Standards (DID, VC)] → [Works with Mobile Wallets] ↓ Feasibility ↓ [Reduced Identity Fraud] ↓ [User Full Control & Privacy] ↓ [Scalable Across Sectors] ↓ [Long-term Cost Savings] ↓ Viability
IMPACT AND BENEFITS 5 @SIH Idea submission- Template Innospark o Impact o User empowerment o Trust build o Digital transformation o Global use o Less dependency o Benefits o Privacy protection o Fraud reducation o Fast verification o Cost effictive o Secure & scalable 5 @SIH Idea submission- Template • Empowers citizens with privacy and control over personal data • Reduces identity fraud significantly by cryptographic proofs • Streamlines processes like eKYC, education certificates, health records • Scalable to government, finance, education sectors; supports digital India vision
RESEARCH AND REFERENCES • SSI is foundational for trustable, user-centric digital identity ecosystems • Future: Integration with e-governance, cross-border identity validation • Potential to transform multiple sectors with enhanced security and privacy 6 @SIH Idea submission- Template Innospark