This document discusses blockchain technology and its potential applications. It begins by introducing CryptoVarna, a group interested in blockchain technologies, cryptocurrencies, and ICOs. It then discusses VarnaLab, an independent hacker space. The document then provides a high-level overview of what blockchain is, including that it is a distributed, immutable, and secure data structure. It discusses the origins and early pioneers of blockchain technology before Satoshi Nakamoto. The document outlines several potential uses of blockchain technology, including cryptocurrency, distributed file storage, digital identity, voting, smart contracts, crowdfunding, and more. It concludes by mentioning some blockchain use cases from companies like IBM.

1. Blockchain
Technology
Intro
by Galin Dinkov
https://www.linkedin.com/in/galindinkov/
17 Oct 2017

2. About CryptoVarna
CryptoVarna is a group of people interested in Blockchain technologies, cryptocurrencies, ICOs and the
possibilities they provide. It is an open group with members specialized in different fields, from informatics to
law.
Facebook Group:
https://www.facebook.com/groups/123317971755498
Meetup.com:
https://www.meetup.com/preview/CryptoVarna-Blockchains-Bitcoins-Ethereum
Slack:
https://cryptovarna.slack.com/join/shared_invite/enQtMjYwNDU4OTQxNjIwLTVmOGM4MDEyMjgxYWVlZDRiYmI0OTI4ZGEwMzM3N2Q
wMzkyYzQ2OTFhOTgzZTAzODkyY2EyNjJlZDJhODE4ZmE

3. About VarnaLab
VarnaLab is an independent hacker’s space where people with common interest can meet, work and drink beer.
The spheres of interest include but not limited to: software technologies, hardware and electronics, art and
design, photography, gaming and more.
It is part of huge network of 1600 hackerspaces worldwide.
VarnaLab is a non-profit organization and is free for everyone. It is financially supported by its members by a
non-fixed donations.
Facebook Page:
https://www.facebook.com/varnalab/
Web:
https://varnalab.org
Trello:
https://trello.com/varnalab
Github:
https://github.com/VarnaLab

4. What is the
Blockchain?

5. The Blockchain is…
Data Structure

6. The Blockchain is…
Distributed

7. The Blockchain is…
Immutable

8. The Blockchain is…
Secure

9. The Blockchain is…
Anonymous (Pseudo)

10. The Blockchain is…
Autonomous

11. The Blockchain is…
Public or Private

12. Genesis

13. Before Bitcoin
● Libertarianism
● Evolvement of cryptography
● Cypherpunk
● Online payments
● Hashcash, b-money, Bit Gold
● Financial crises

14. Satoshi
Nakamoto

15. White Paper
White paper: https://bitcoin.org/bitcoin.pdf

16. Who is?
Hal Finney
1st Bitcoin Transaction
PGP Employee
Nick Szabo
Bit Gold
Smart Contracts
Wei Dai
b-money
Crypto++
Dorian Nakamoto
Finney’s neighbour

17. Who is?
Craig Wright
Claims to be Satoshi
Scientists think he’s a
scammer

18. What Can Be Used
For?

19. Cryptocurrency
● No central authority
● Faster* and cheaper* transactions
● Anonymous*
● Transparent
● Limited supply

20. Distributed File Storage
● Distributed
● Cheaper
● More secure
● Everyone can earn
● Filecoin made ICO for $200m+
Storj.io: https://vimeo.com/102119715

21. Digital Identity
● Easier to use
● Better privacy
● Safer against data breach
Interesting:
Password Pill
e-Estonia
Civic: https://youtu.be/2XDGX41nr1o

22. Voting
● Saves time
● Everyone can vote from
everywhere, anytime
● More secure!
● Immediate and transparent
results
● Anonymous
● Saves millions

23. Smart Contracts
● Rules in a form of a program
● Could replace the notaries
● Cannot be modified
● Validated and guaranteed by
thousands of independent nodes
instead of the court or the
government
● Smart property

24. Distributed Autonomous Organization

25. Crowdfunding (ICO)

26. Public Records
● No papers!
● Secure
● Transparent
● Cheaper
● Land/Property Registry of Russia,
Georgia, Sweden, Dubai

27. Copyrights
● Can prove the date and author of
any creation
● Lot cheaper and easier to use and
verify

28. IoT
● Secure communication between IoT
devices
● Sensors storing tamper-proof data
● Supply chains
IBM Blockchain: https://youtu.be/ZKscEx2lO-4

29. Car Leasing
IBM Demo: https://youtu.be/IgNfoQQ5Reg

30. Final
https://www.linkedin.com/in/galindinkov/
by Galin Dinkov