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ZK Identity for the Unbanked: Building Sybil-Re...
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Olubisi Idris Ayinde
August 07, 2025
Education
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ZK Identity for the Unbanked: Building Sybil-Resistant Systems Without KYC
Olubisi Idris Ayinde
August 07, 2025
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Transcript
ZK Identity for the Unbanked: Building Sybil-Resistant Systems Without KYC
ETH Enugu - Aug 2025
Idris Olubisi Developer Relations Engineer @olanetsoft
• Developer Relations Engineer • Cracked Dev • Founder, Web3
Afrika & Developer DAO member • Technical writer @ Freecodecamp, Section Engineering, MediaJam (Cloudinary), AppSmith, ImageKit, Aviyel, Hackmamba • Web3 technical writer @ Hashnode, LogRocket, Moralis, Alchemy, Infura
What will you learn in this session? • Zero Knowledge
Proofs • Building a Sybil Resistance system • ZK Identity Use cases • Ecosystem Impact
What would a farmer need for a loan to buy
seeds aside money?
What if the farmer doesn’t have money?
A Farmer Story - Okenye
The Problem • 1 billion people globally lack formal identity
documents
The Problem • 1 billion people globally lack formal identity
documents • 1.7 billion adults remain unbanked
The Problem • 1 billion people globally lack formal identity
documents • 1.7 billion adults remain unbanked • Traditional KYC requirements exclude the most vulnerable
The Current Solution Biometric databases: Privacy nightmare, centralized control
The Current Solution Paper documents: Easily lost, forged, or inaccessible
The Current Solution Traditional KYC: Expensive, exclusive, invasive
Is this enough ?
Is this enough ? Does it work everytime ?
Zero-Knowledge Proofs ZK Proofs = Mathematical Magic
Zero-Knowledge Proofs • Prove something is TRUE • Without revealing
the information itself • Like showing you have a key without displaying the key
ZK and Identity ?
Digital Identity = Unique Mathematical Fingerprint • Not your name
or face
Digital Identity = Unique Mathematical Fingerprint • Not your name
or face • Just proof you're a unique human
Digital Identity = Unique Mathematical Fingerprint • Not your name
or face • Just proof you're a unique human • One person = One identity, guaranteed
Self Protocol Open-source identity protocol using ZK proofs
Self Protocol: Open-source identity protocol using ZK proofs How it
works: • 📱 Scan your passport with phone's NFC
Self Protocol: Open-source identity protocol using ZK proofs How it
works: • 📱 Scan your passport with phone's NFC • 🔐 Generate ZK proof locally (no data leaves device)
Self Protocol: Open-source identity protocol using ZK proofs How it
works: • 📱 Scan your passport with phone's NFC • 🔐 Generate ZK proof locally (no data leaves device) • ✅ Share proof without revealing personal data
Use Cases in Action Rural Farmers • Seasonal loans without
collateral • Crop insurance participation • Direct subsidy distribution
Use Cases in Action Cross-Border Workers • 1% remittance fees
(vs 7% traditional) • No bank account needed • Instant settlement
Use Cases in Action Refugee Communities • Financial identity without
documents • Access to aid distribution • Rebuild economic life
Ecosystem Benefits • For Users: Financial inclusion, privacy, dignity •
For Protocols: Sybil resistance, fair distribution
Ecosystem Benefits • For Communities: Local economic growth • For
Governments: Efficient subsidy distribution
Live Demo • Identity Creation • Verification • Sybil Resistance
• Community Integration • Frontend: React + Self QR SDK • Backend: Node.js + Self Verifier • Smart Contracts: Solidity + Self Protocol • Privacy: Groth16 zk-SNARKs
Recap • ✅ Identity without documents • ✅ Privacy without
compromise • ✅ Finance without banks • ✅ Inclusion without barriers
Together, we can bring 1 billion people into the digital
economy - not by asking them to change, but by changing how identity works.
Thank You! @olanetsoft