An Ethereum blockchain use-case in Java

Topics:
Blockchain Intro
Bitcoin / Ethereum
Consensus mechanisms, Security, Privacy
Live Demo of both EthereumJ and Web3J
Examples
Future

Transcript

1. An Ethereum blockchain use-case in Java DevMotion Meetup - Back-to-back Blockchain 24 Oct 2017 Arjen Tebbenhof
2. Agenda Blockchain Intro Bitcoin / Ethereum Consensus, Security, Privacy Demo (EthereumJ and Web3J) Examples + Future
3. Blockchain Components: 1. Shared public ledger 2. Ad-Hoc P2P network (no authority) 3. Cryptography + Hashing Blockchain provides a trusted layer without a central authority
4. Blockchain Ledger: • Transaction signed • Transactions in block • Blocks hashed • Chain of blocks
5. Blockchain Result: 1. Transparency and verifiable state (consensus) 2. Resilience 3. Censorship resistant 4. Tamper Proof
6. Bitcoin 2009 (Satoshi Nakamoto), BitCoin ( or BTC) Consensus (Proof of Work) • block reward • locating PoW is hard, verification is easy • 51% attack Partition and Forks
7. Ethereum 2013 (Vitalik Buterin), Ether (Ξ or ETH) Smart Contracts EVM (Ethereum Virtual Machine) Gas: Transaction pricing mechanism
8. Ethereum Consensus: Proof of Work ↔ Proof of Stake Security: Oracle Privacy: Encrypt, IPFS
9. Demo EthereumJ github.com/ethereum/ethereumj Web3J web3j.io
10. Examples Applications • Supply chains • Intellectual property + copyright • Insurances • Votings • Central banks Hyperledger, Enterprise Ethereum Alliance
11. Future Current challenges: Scalability and Governance • Raiden network • Sharding Formal Verification Services
12. Arjen Tebbenhof @tebbenhof linkedin.com/in/tebbenhof "A blockchain is a magic computer that anyone can upload programs to and leave the programs to self-execute, where the current and all previous states of every program are always publicly visible, and which carries a very strong crypto economically secured guarantee that programs running on the chain will continue to execute in exactly the way that the blockchain protocol specifies." -Vitalik Buterin