BLOCKCHAINPresented by Emrah Semiz

Agenda• What is block chain • History• Blockchain overview• Blockchain transaction flow• Blockchain mining• Applications of Blockchain• Future of blockchain• Q&A

What is Blockchain• A blockchain is a data structure that makes it possible to

create a way to execute de-centralized consensus.• Distributed public Ledger

History• 1976 : New Directions in cryptography by Diffie–Hellman• 1983 : Blind Signatures for Untraceable Payments by David Chaum• 2008 Nov : Bitcoin Paper published by Satoshi Nakamoto• 2009 Jan : Bitcoin goes live• 2010 May 22 : user “laszlo” made the first real-world transaction – two pizzas

for 10,000 BTC• 2011 Jan : Silk Road established• 2013 Nov : US Senate holds its first hearings on the digital currency• 2013 Dec : China bans bitcoin

Blockchain flow overview

Block Chain Transaction

Blockchain Transaction 2

Blockchain transaction 3

Blockchain transaction 4 complex

Blockchain mining 1

Blockchain mining 2

Blockchain mining 3

Blockchain Fork

Blockchain block tampering

Currency

Pegged Services

Smart Contracts

Decentralized Autonomous Orgs

Future of blockchain

Links• https://bitcoin.org/bitcoin.pdf• https://www.ethereum.org/• https://bitnation.co/• https://blockstack.org/• https://www.bigchaindb.com/whitepaper/bigchaindb-

whitepaper.pdf• https://www-ee.stanford.edu/~hellman/publications/24.pdf