1. Blockchain Technology

2. Outline
What is Blockchain
Applications
Example: Bitcoin

3. link

4. What is Blockkchain link
Blockchain technology offers a way for untrusted parties to reach consensus on a common digital history. A common digital history is important because digital assets and transactions are in theory easily faked and/or duplicated.
Blockchain technology solves this problem without using a trusted intermediary.

5. Blockchain/Block chain link
A growing list of records, called blocks
Linked using cryptography
Each block contains a cryptographic hash of the previous block,  a timestamp, and transaction data
It is an
Open distributed ledger
Record transactions between two parties efficiently in a verifiable and permanent way
Typically managed by a peer-to-peer network collectively adhering to a protocol for inter-node communication and validating new blocks]

6. Blockchain (continued) link
Once recorded, the data in any given block cannot be altered retroactively without alteration of all subsequent blocks
Blockchains may be considered secure by design and exemplify a distributed computing system with high Byzantine fault tolerance. 
Decentralized consensus has therefore been claimed with a blockchain.

7. Blockchain (continued) link
Blockchain was invented by a person (or group of people) using the name Satoshi Nakamoto (unknown identity) in 2008
Serve as the public transaction ledger of the cryptocurrency bitcoin
Blockchains which are readable by the public are widely used by cryptocurrencies.
Blockchain is considered a type of payment rail

8. Bitcoin network link

9. Bitcoin network link

11. Bitcoin Bitcoin is a cryptocurrency
Invented in 2009 by an anonymous founder known as Satoshi Nakamoto.
Isn’t managed by a bank or agency but
transactions are recorded in the blockchain
It is public and contains records of each and every transaction that takes place.
The cryptocurrency is traded by individuals with cryptographic keys that act as wallets. 
Bitcoins are moved in blocks every 10 minutes on a decetnralized ledger that connects blocks into a coherent chain dating back to the first genesis block.
It was originally described as a peer-to-peer electronic cash but the technology has evolved to emphasize being a settlement layer rather than a payment network.

12. Blockchain – Uses link Cryptocurrencies
use blockchain technology to record transactions
bitcoin network is based on blockchain
May 8, 2018 Facebook 
Is opening a new blockchain group
Headed by David Marcus (previously was in charge of Messenger).
According to The Verge Facebook is planning to launch its own cryptocurrency for facilitating payments on the platform.

13. Blockchain – Uses (continued) link
Smart contracts
Proposed contracts that
could be partially or fully executed or enforced without human interaction.[53] 
Objectives of a smart contract
automated escrow
An IMF staff discussion reported that
Smart contracts based on blockchain technology might reduce moral hazards and optimize the use of contracts in general.
“No viable smart contract systems have yet emerged." Due to the lack of widespread use their legal status is unclear.

14. Blockchain – Uses (continued) link
Financial services
Major portions of the financial industry are implementing distributed ledgers for use in banking and according to a September 2016 IBM study, this is occurring faster than expected.
Banks are interested in this technology because it has potential to speed up back office settlement systems.
Banks are
opening new research labs dedicated to blockchain technology
Financial services - increase efficiency and reduce costs.
Berenberg, a German bank, believes that
blockchain is an "overhyped technology"
still has major challenges and very few success stories.

15. Blockchain – Uses (continued) link
Supply chain
Industries trying to employ blockchains in supply chain logistics and supply chain management.
Works to develop open standards for supply chains.
Walmart and IBM are running a trial to use a blockchain-backed system for supply chain monitoring — all nodes of the blockchain are administered by Walmart and are located on the IBM cloud.[70]

16. Types of blockchains link
Public blockchains
A public blockchain has absolutely no access restrictions.
Anyone with an Internet connection can send transactions to it as well as become a validator (i.e., participate in the execution of a consensus protocol).
Public blockchains example:
Bitcoin blockchain
Ethereum blockchain.

17. Types of blockchains (continued) link
Private blockchains
Join when invited by the network administrators.
Participant and validator access is restricted.
interested in the blockchain technology in general but are not comfortable with a level of control offered by public networks.
Typically, they seek to incorporate blockchain into their accounting and record-keeping procedures without sacrificing autonomy and running the risk of exposing sensitive data to the public internet

18. Types of blockchains (continued) link
Consortium blockchains
semi-decentralized.
is permissioned
A number of companies each controlled and operated a node on such a network.
The administrators of a consortium chain
restrict users' reading rights as they see fit and
only allow a limited set of trusted nodes to execute a consensus protocol.

19. Types of blockchains (continued) link
Hybrid blockchains
combination between different characteristics both public and private blockchains have by design.
It allows to determine what information stays private and what information is made public.

20. Bitcoin Price (BTC) 17394.97 (Dec 2017)

21. Videos
How the blockchain is changing money and business | Don Tapscott link
TED Talks: The Blockchain Explained Simply Link
How Bitcoin Works Under the Hood link

22. Businesses
FedEx Executive Advocates for Industry Blockchain Standards link
London Stock Exchange CEO Is Certain That Blockchain Can Be Used in Issuing, Settlement
London Stock Exchange CEO hints at how the 300-year-old trading venue could use blockchain link
80 Firms Including MasterCard, Coinbase Spent $42 Mln Lobbying Crypto, Fintech Issues in Q1
Singapore and Canada Central Banks Complete First Cross-Border Blockchain Payment