CAPTCHA INDEX
Human Verification Protocol
Whitepaper v1.0 | March 2026
Abstract
Captcha Index introduces a decentralized proof-of-humanity protocol designed to protect Web3 from automated bot attacks, sybil farming, and unfair participation. Through cryptographic challenges and zero-knowledge proofs, the protocol verifies human users without collecting personal data or requiring traditional KYC. Once verified, users receive a soulbound NFT credential that provides access to protected protocols across the ecosystem.
Table of Contents
1. The Bot Problem
Web3 faces an existential threat from sophisticated bot networks that exploit decentralized systems at scale. These automated actors drain value from legitimate users through various attack vectors.
- Airdrop farming drains millions from communities
- Governance manipulation through sybil accounts
- NFT sniping bots destroy fair launches
- DeFi protocols face MEV and sandwich attacks
2. Verification Mechanism
Captcha Index employs a multi-layered approach combining behavioral analysis, cryptographic challenges, and reputation systems to verify humanity while preserving privacy.
Challenge Layer
Cryptographic puzzles that require human cognitive patterns to solve, resistant to ML-based automation.
Behavioral Analysis
On-chain transaction patterns and wallet history analysis to detect automated behaviors.
5. Tokenomics
6. Roadmap
Mainnet Launch
Verification protocol live with initial dApp integrations
SDK Release
Developer toolkit for easy protocol integration