This document provides an overview of key concepts related to blockchain and smart contracts, including: - Cryptocurrency uses cryptography to securely record and verify transactions on a public blockchain ledger. - Blockchain is a continuously growing list of transaction records stored in blocks that are cryptographically linked together. - Bitcoin is a decentralized cryptocurrency network that allows peer-to-peer transactions without intermediaries. - Ethereum is an open-source blockchain platform that enables smart contracts through a native cryptocurrency. - Smart contracts are computer programs that automatically execute transactions according to predefined rules.

1. ILLUSTRATED DICTIONARY
BLOCKCHAIN AND SMART
CONTRACTS (SESSION 4)
Hands-on introduction for
Software Developers and
Architects

2. PLAN FOR TODAY
Understand concepts and terminology

3. CRYPTOCURRENCY
Is a tradable entity (digital currency) that use
cryptography to
secure its transactions
control the creation of additional units
verify the transfer of assets
Use decentralized control that works through
a public transactional database built on top of
blockchain

4. BLOCKCHAIN
 Continuously growing list of
records, called blocks
 Linked and secured using
cryptography
 Each block contains
Cryptographic hash of the previous
block
Timestamp
Transaction data

5. BITCOIN
Is a cryptocurrency with the following
characteristics:
Global peer to peer network
Decentralized (no single entity can control it)
Open source (wallet & transaction verification)
Bypassing middlemen or central authority
No issuer or acquirer
Anyone with a computer or smartphone can
use it

6. BLOCK EXPLORER

7. ETHEREUM
Distributed computing platform
 open-source
Public
blockchain-based
Features smart contract (scripting) functionality
 Cryptocurrency

8. SMART CONTRACT
Computer protocol intended to
digitally facilitate, verify, or enforce
the negotiation or performance of
a contract
Allow the performance of credible
transactions without third parties
Transactions are trackable and
irreversible
Cryptocurrencies have
implemented smart contracts

9. DAPP (DECENTRALIZED
APPLICATION)
Open-source
Operate autonomously
No entity controlling the majority of its tokens
All changes must be decided by consensus of its users
Application data and records of operation must be
cryptographically stored in a public, decentralized blockchain
The application must use a cryptographic token (bitcoin or a
token native to its system)
The application must generate tokens according to a standard
cryptographic algorithm acting as a proof of the value nodes
are contributing to the application

10. DAO
DECENTRALIZED AUTONOMOUS
ORGANIZATION
Organization that is run through rules
encoded as computer programs called smart
contracts
Has an objective to provide a new
decentralized business model
Has no conventional management structure or
board of directors
Stateless (not tied to any particular nation
state)

11. STAY IN TOUCH
Gene Leybzon https://www.linkedin.com/in/leybzon/
https://www.meetup.com/members/90744
20/
https://www.leybzon.com