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Blockchain Technology
Overview, Brief History
& Applications.
---
Abderrahman Ait-Ali, abde@kth.se
PhD Candidate – KTH Roy...
Content - Outline
› Blockchain Technology
– What is it?
– Characteristics
– Example: Bitcoins
› Brief History
› Applicatio...
> Blockchain Technology
- What is it?
› Blockchain is a peer-to-peer public ledger maintained by
a network of computers wi...
> Blockchain Technology
- Characteristics?
› Openness
– Database is open, in principle, to anyone.
– Based on open source ...
> Blockchain Technology
- Example: bitcoin
› Famous example of a blockchain Technology
is
› Bitcoin is
– A cryptocurrency ...
> Brief History of Blockchain Technology
› 1991 – 1998: First work on a cryptographically secured
chain of blocks.
› 1998:...
> Applications
> Applications
- Finance
› Cryptocurrency:
– Digital currency using cryptographic encryption
– E.g. Bitcoin, Ethereum (at ...
> Applications
- Financial Companies
> Applications
- Internet of Things, IoT
› Digital Identity
– Computer information for entity (person, organization, devic...
> Applications
- Others (ideas)
› Distributed DNS
– DNS management using blockchain ledgers.
– E.g. ICANN DNSSE.
› Funders...
> Conclusions
› Blockchain is a relatively new technology in the Internet.
› It has very desirable characteristics in an i...
References
2017-03-06 13
› Blockchain ABC (cover picture)
› Making Blockchain Real for Business, IBM Blockchain
Technology...
Thank you!
Questions?
2017-03-06 14
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Blockchain Technology - ICANN58

  1. 1. Blockchain Technology Overview, Brief History & Applications. --- Abderrahman Ait-Ali, abde@kth.se PhD Candidate – KTH Royal Institute of Technology Hivos IGMENA Alumni ICANN58, Copenhagen - Denmark
  2. 2. Content - Outline › Blockchain Technology – What is it? – Characteristics – Example: Bitcoins › Brief History › Applications – Finance – Internet of Things, IoT – Others (ideas): Distributed DNS › Conclusions
  3. 3. > Blockchain Technology - What is it? › Blockchain is a peer-to-peer public ledger maintained by a network of computers without the need for a central authority. › It consists of: – Transaction – Transaction record – Transaction verification and storage system › It is a distributed database that maintains a chain (i.e. chronologically ordered) of blocks (i.e. records).
  4. 4. > Blockchain Technology - Characteristics? › Openness – Database is open, in principle, to anyone. – Based on open source software technology. › Decentralization – Decentralized ledger – Distributed Networking › Security – Encryption using Public Key Cryptography. – Hash function. › Resilience – Archiving information – Database replication › And many more: Immutability, consensus, traceability…
  5. 5. > Blockchain Technology - Example: bitcoin › Famous example of a blockchain Technology is › Bitcoin is – A cryptocurrency (first ever), i.e. currency using cryptography to secure transactions and control the creation of new units. – A payment system, used for transfer of monetary value.
  6. 6. > Brief History of Blockchain Technology › 1991 – 1998: First work on a cryptographically secured chain of blocks. › 1998: Nick Szabo introduced bit gold as mechanism for a decentralized digital currency and smart contracts. › 2000: Stefan Konst introduced a general cryptographic theory of secured chains. › 2008: Satoshi Nakamoto introduced bitcoin as the first conceptualization of the blockchain technology. › 2014: start of Blockchain 2.0, the second-generation block chain technology with new application (e.g. intellectual property, social inequality).
  7. 7. > Applications
  8. 8. > Applications - Finance › Cryptocurrency: – Digital currency using cryptographic encryption – E.g. Bitcoin, Ethereum (at first), Dash (formerly XCoin), etc. › Smart Contracts – Computer protocols to facilitate executing contracts. – E.g. The DAO (distributed autonomous organization), Ethereum, R3, Blockstream, RSK, etc. › Funding
  9. 9. > Applications - Financial Companies
  10. 10. > Applications - Internet of Things, IoT › Digital Identity – Computer information for entity (person, organization, device) identification. – E.g. Shocard, Internet-of-People (by ConsenSys). › IoT security – Reduce IoT Vulnerabilities – E.g. Cryptotronix, IOTA, Chain of Things (CoT).
  11. 11. > Applications - Others (ideas) › Distributed DNS – DNS management using blockchain ledgers. – E.g. ICANN DNSSE. › Funders-NGOs Match-making – Matching NGOs with funders for social services and humanitarian aids. – E.g. The Bright Web (from tech4d.org) › International Technical Organization – IEEE Blockchain Summit – ISOC's Blockchain Special Interest Group (ISOC-BSIG)
  12. 12. > Conclusions › Blockchain is a relatively new technology in the Internet. › It has very desirable characteristics in an internet service. › It also has a wide range of applications with great implications on internet services. › However, blockchain technology has several challenges that needs to be solved such as scalability, regulation (ICANN?), integration, privacy, etc.
  13. 13. References 2017-03-06 13 › Blockchain ABC (cover picture) › Making Blockchain Real for Business, IBM Blockchain Technology, IBM. › A gentle introduction to blockchain technology, Bits on blocks. https://bitsonblocks.net/2015/09/09/a-gentle-introduction-to-blockchain-technology/ › Blockchain Smart Contracts, Blockchain Technologies. http://www.blockchaintechnologies.com/blockchain-smart-contracts › Blockchain Revolutionizing Identity Management, ShoCard. https://shocard.com/cpt_news/blockchain-revolutionizing-identity- management/
  14. 14. Thank you! Questions? 2017-03-06 14
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    Apr. 28, 2017

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