Introduction to

 DECENTRALIZED COMPUTING

WITH ETHEREUM

presented by:

[Hamid Salehian]

Who's Win

Ant Colony vs grizzly beaR

Most PowerFul SUperComputer

Cores: 10,649,600

Memory: 1,310,720

Linpack Performance: 93.014 PFLOPS 

(Max: 125.436 PFLOPS)

Sunway Taihulight

*PFLOPS : 1 000 000 000 000 000 floating point operations per second

Cores: May Infinite

Memory: May Infinit

Linpack Performance: 80704290.84 PFLOPS

Super SUperComputer

850000x Faster than Top 500 Supercomputers

How

Decentralized Computing

LEt's Start With

Decentralized Computing:

What?

Remember: BitTorrent

PRos

- Low Downtime ( Zero)

- No Central Point of Failure

- Infinite Scalability

- High Performance

- Maximize Efficiency

- Lacks centralized points of vulnerability

- Incorruptible

- Data Transparent

- Low Cost

- Low Control

- Difficult to Manage

- Difficult to Implement

Decentralized Computing:

BitterSweet

CONS

How To IMPLEMENT

So...

BlockChain

- Chain of Block contain Information

- Decentralized Database or data structure

- Records are permanent

- Extremely difficult to change or remove

- Timestamped Transaction

- No single individual or organization maintains the database

- Transparent record of exchange

BLOCKChain: WHAT IS?

BLOCKChain: Structure

Hash(Signature)

Data

Hash of Prev Block

*Hash = Sign ( data, private key)

SHA256

● Similar to a page in a paper ledger

● Each block depends on the previous block making a chain from the origin

● To edit a transaction in a block would require recalculation of all blocks after it

● Normally uses a distributed ledger with a consensus system and public/private key cryptography

HOW BLOCKChain Works? 

Hash: 1Z8F

Prev Hash: 0000

Hash: 6BQ1

Prev Hash: 1Z8F

Hash: 3HQ4

Prev Hash: 6BQ1

Data

Data

Data

HOW BLOCKChain Works? (ConT) 

Hash: 1Z8F

Prev Hash: 0000

Hash: 6BQ1

Prev Hash: 1Z8F

Hash: 3HQ4

Prev Hash: 6BQ1

3FTQ

Data

Data

Hash: 1Z8F

Prev Hash: 0000

Hash: 6BQ1

Prev Hash: 1Z8F

Hash: 3HQ4

Prev Hash: 6BQ1

3FTQ

Text

Proof of Work

Consesus

51% Accept that block is valid

HOW BLOCKChain Works? (ConT) 

HOW BLOCKChain Works? (ConT) 

BitCoin:

BlockChain as CryptoCurrency

Blockchain for ComputatioN

Why Not??

Ethreum: the WoRld Computer

• Decentralized application (dApp) platform
• Programmable Blockchain (Blockchain 2.0)
• Use capability of Blockchain to compute against currency
• Combination of cryptographic architecture and Turing completeness
• Applications, which never shutdown
• Runs computer codes equivalently on many computers around the world
• Not only Cryptocurrency 

Ethreum: History

• Described by Vitalik Buterin in late 2013
• Vitalik published the Ethereum white paper
• Early 2014, Swiss Company Ethereum Switzerland GmbH Develop Ethereum Software Project

Bitcoin VS Ethereum

Bitcoin = Decentralized Data Storage

Ethereum = Decentralized Data Storage + Computation

VS

How Ethereum Works?

Ethereum: Glossory

Every node (computer) in the network runs something called Ethereum Virtual Machine (EVM)

• EVM: Think of it as a operating system that understands and executes the software written in Solidity
• Solidity: Ethereum specific programming language
• Smart Contract: The software/apps executed by Ethereum Virtual Machine
• Gas : Specific costs for execution of different type of statements

How Ethereum Works??

Smart Contract

DApp

projects

WeiFund - Decentralized Crowdfunding Platform

Airlock - Access Protocol for Smart Property and IoT

Provenance - Project to Increase the transparency and accountability of supply chain

Augur - Decentralized prediction market platform

Golem - Decentralized Supercomputer

Vevue - Decentralized Video Sharing

SafeMarket - Decentralized Trade System

Agrello - AI based Smart Contract

​La Zooz - Decentralize Uber app

OpenBazzar - Decentralized Marketplace

Storj - Decentralized Cloud Storage Dropbox

....

Blockchain of

Things

IOT Concenrns

Secure Communication

Privacy, and reliability concerns

Tamper-proofing

Trustless messaging

Blockchain & IOT

• Connected Vehicles
• Smart Appliances
• Supply Chain Sensor​
• Power Sharing

Question!?

References

1. O'Reilly - Decentralized Applications (Siraj Raval)
2. Apress - Introduction to Ethereum and Solidity (Chris Dannen)
3. Blockchain Basics (Daniel Drescher)
4. The Science of the Blockchain (Roger Wattenhofer)

Thank You For Your Attention

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