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Gabriele Marazzi - Self-Sovereign Identity and Blockchain: use case, advantages and Legal Issues - Codemotion Milan 2017

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Blockchain is an open distributed ledger, censorship resistant and without frontiers. Is the perfect technology for decentralizing digital identity. In this talk we will get into details of Self-Sovereign Identity system based on blockchain with some use case, and legal issues.

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Gabriele Marazzi - Self-Sovereign Identity and Blockchain: use case, advantages and Legal Issues - Codemotion Milan 2017

  1. 1. Gabriele Marazzi CEO & Co-founder gabriele@spidchain.com www.spidchain.com
  2. 2. Blockchain ● Bittorrent: information exchange ● e-cash: who ● Hashcash: what ● Bitcoin: when
  3. 3. Bitcoin first of all
  4. 4. More value
  5. 5. More secure
  6. 6. 90% if not bitcoin is a scam!
  7. 7. Bitcoin? No … blockchain!
  8. 8. Blockchain is not an innovation
  9. 9. Papyrus chain
  10. 10. Papyrus chain 1 2 3
  11. 11. Decentralization
  12. 12. Bitcoin innovations ● Permissionless ● Trustless ● Censorship resistant
  13. 13. The Byzantine Generals Problem & the Proof of Work Leslie Lamport The Byzantine Generals Problem
  14. 14. A: Attacco R: Ritirata Consent Nakamoto
  15. 15. A: Attacco R: Ritirata Difficult to solve, easy to verify
  16. 16. A: Attacco R: Ritirata Difficult to solve, easy to verify
  17. 17. A: Attacco R: Ritirata Difficult to solve, easy to verify
  18. 18. A: Attacco R: Ritirata Difficult to solve, easy to verify
  19. 19. A: Attacco R: Ritirata Associate to each message a problem
  20. 20. A: Attacco R: Ritirata A: Attack R: Retreat Consensus among generals
  21. 21. Other forms of consensus ● POW - Proof of Work ● POS - Proof of Stake ● POA - Proof of Authority ● Other ● Permissioned → Private (DLT) ● Permisionless → Public (Blockchain)
  22. 22. blockchains & dlt Bitcoin Ethereum Bitshares NEM Hyperledger
  23. 23. Blockchains VS Distributed Ledger Technology VS
  24. 24. Self-sovreign identity
  25. 25. SPID: “Sistema Pubblico Identità Digitale” ● Single point of failure ● Lack of flexibility ● Privacy problem
  26. 26. Self-sovereign identity ● Data are stored in personal a device ● User is the only owner of his personal data ● Web of trust & privacy by design
  27. 27. Advantages ● No single point of failure ● Privacy by design ● Trusted identity
  28. 28. Web of trust
  29. 29. Certificate on the blockchain blockchain
  30. 30. Certificate on the blockchain blockchain
  31. 31. Certificate on the blockchain blockchain
  32. 32. Marketplace blockchain
  33. 33. Gabriele Marazzi CEO & Co Founder gabriele@spidchain.com +39 389 11 11 239 www.spidchain.com Thank You

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