4. B-money ↗ 5. Reusable proofs of work ↗ 6. Secure property titles with owner authority ↗ 7. Bitcoin whitepaper ↗ 8. Namecoin ↗ 9. Zooko's triangle ↗ 10. Colored coins whitepaper ↗ 11. Mastercoin whitepaper ↗ 12. Decentralized autonomous corporations, Bitcoin Magazine ↗ 13. Simplified payment verification ↗ 14. Merkle trees ↗ 15. Patricia trees ↗ 16. GHOST ↗ 17. StorJ and Autonomous Agents, Jeff Garzik ↗ 18. Mike Hearn on Smart Property at Turing Festival ↗ 19. Ethereum RLP ↗ 20. Ethereum Merkle Patricia trees ↗ 21. Peter Todd on Merkle sum trees ↗ For history of the white paper, see https://github.com/ethereum/wiki/blob/old-before-deleting-a Ethereum, like many community-driven, open-source software projects, has evolved since its in