Blockchain technology allows for the creation of a digital ledger that can record transactions and other data across a decentralized network. Each computer that participates in the blockchain network, called a node, has access to and helps maintain the ledger. The ledger is stored across the entire network and is difficult to corrupt, making blockchain suitable for applications like payments, data sharing, digital voting, and supply chain management. Some advantages include traceability, cost effectiveness, quality assurance through origin tracking, and enabling smart contracts. However, challenges remain around digital signature verification, reaching consensus across the decentralized network, and redundancy compared to centralized databases. Widespread adoption may begin in 2020 if blockchain can prove economically viable beyond experimental programs.

1. https://techbeacon.com/blockchain-it-right-your-app
Blockchain
=
The Trust Machine

2. What is Blockchain Technology
The blockchain is an incorruptible digital ledger of
economic transactions that can be programmed to
record not just financial transactions but virtually
everything of value.”

3. Node in Blockchain
A node simply a specific computer that participates
in the blockchain technology network.
Every node is also an administrator of the blockchain,
and joins the network voluntary.

4. Centralized Network

5. Where might blockchain use Cryptography

6. How the BlockchainTechnologyWorks

7. What is Cryptocurrency
• A cryptocurrency is a digital or virtual currency
designed to work as a medium of exchange.
• It uses cryptography to secure and verify
transactions as well as to control the creation of new
units of a particular cryptocurrency.
• Essentially, cryptocurrencies are limited entries in a
database that no one can change unless specific
conditions are fulfilled.

8. There are many Cryptocurrency

9. Example of Cryptocurrency

10. Some of most valuable cryptocurrency
Name Price
• Bitcoin $6,715
• Ethereum $469
• XRP $0.4715
• EOS $7.93
• LightCoin $83.52
• Dash $245

11. Bitcoin
• Then, in early 2009, an anonymous programmer or
a group of programmers under an alias Satoshi
Nakamoto introduced Bitcoin. Satoshi described it
as a ‘peer-to-peer electronic cash system.’ It is
completely decentralized, meaning there are no
servers involved and no central controlling
authority.The concept closely resembles peer-to-
peer networks for file sharing.
Satoshi Nakamoto
an anonymous programmer

12. Uses of blockchainTechnology
• Payment processing and money transfers
Arguably the most logical use for blockchain is as a means to
expedite the transfer of funds from one party to another.
• Data sharing
Cryptocurrency IOTA launched a beta version of its Data
Marketplace in November, demonstrating that blockchain could be
used as a marketplace to share.
• Digital voting
Worried about voter fraud? Well, worry no more with
blockchain technology. Blockchain offers the ability to vote digitally,
but it's transparent enough that any regulators would be able to see
if something were changed on the network.
• Blockchain Used For Besides Bitcoin?

13. Advantages of Blockchain
1. Supply chain management.
• For supply chain management, the blockchain technology offers the benefits of traceability
and cost-effectiveness.
2. Quality assurance.
• If an irregularity is detected somewhere along the supply chain, a blockchain system can
lead you all the way to its point of origin.
3. Smart contracts.
• Time-consuming contractual transactions can bottleneck the growth of a business,
especially for enterprises that process a torrent of communications on a consistent basis.
4.Voting.
• Just like in supply chain management, the promise of blockchains in the aspect of voting all
boils down to trust. Currently, opportunities that pertain to government elections are being
pursued.

14. Disadvantages of Blockchain
• Signature verification. Every blockchain transaction must be digitally
signed using a public-private cryptography scheme such as ECDSA.
• Consensus mechanisms. In a distributed database such as a blockchain,
effort must be expended in ensuring that nodes in the network reach
consensus.
• Redundancy. This isn’t about the performance of an individual node, but
the total amount of computation that a blockchain requires. Whereas
centralized databases process transactions once (or twice).

15. So, 2020 will be the year when a collection of lab-based tests move into limited
pilot programs and early production.
Success will be measured not only on functional merits but on economics.
Blockchain technology is just beginning to meet marketplace realities.