ERC 725 Public On-Chain Identity
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Presentation by Fabian Vogelsteller, LUKSO, Founder and Developer ERC 725 is gaining traction as a concept for on-chain identity. What is it, how does it work and why does it matter?
ERC 725 Public On-Chain Identity
- 2. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io Fabian Vogelsteller Ethereum Wallet Mist Browser web3.js Flat File CMS ERC-20: Token StandardT
- 3. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 4. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 5. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 6. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 7. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity? Claim 1 Physical Claim 2 New Claim 3
- 8. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 9. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity? Its all claims!
- 10. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io What is identity?
- 11. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io
- 12. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io Mastercoin Counterparty DigiX
- 13. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity
- 14. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io
- 15. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Keys Execution Claims
- 16. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Keys Can be actors (logins, proofs, access) Can make transactions Can sign documents Can sign claims
- 17. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Execution Act as your identity (execute contracts, voting, ...) Add claims to other identities and contracts
- 18. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Can be added by anyone Need approval Can't be changed without your permission, but removed Contain issuer signature Contain claim reference (hash, bit-mask) Claims
- 19. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Claims { uint256 claimType; uint256 scheme; address issuer; bytes signature; // holder.address + claimType + claim bytes data; string uri; }
- 20. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Off-Chain Usage 1. Random String 2. Random String + Identity Address -> signed 3. getClaim() 4. Check claim
- 21. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity On-Chain Usage 2. getClaim() 1. superCoolFunc() 3. Check claim (check claim signature get key) 4. Check if claim issuer still holds key from signature Issuer 5. continue execution of superCoolFunc()
- 22. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity Claim Checking { uint256 claimType; address issuer; uint256 signatureType; bytes signature; // holder.address + claimType + claim bytes claim; string uri; } 1. Check which signature type is used 2. Build the signed hash keccak256(address holder_address + uint256 _claimType + bytes _claim) 3. Recover address k from signature 4. Check if issuer identity contract still holds address k 5.
- 23. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity ERC 725 Identity ERC 735 Claim Holder
- 28. Fabian Vogelsteller, web3.js Developer at Ethereum, Founder LUKSO @feindura lukso.io ERC: Identity https://github.com/ethereum/EIPs/issues/735 https://github.com/ethereum/EIPs/issues/725 Contribute!