Block chain
- 1. BLOCK CHAIN - Saranya Krishnan 7/10/2018 1
- 2. Block chain -DatabaseDefinition a digital ledger in which transactions made in bitcoin or another cryptocurrency are recorded chronologically and publicly. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography .Each block contains typically a hash pointer as a link to a previous block, a timestamp and transaction data. The first distributed blockchain7/10/2018 2
- 3. Block chain - database A blockchain database consists of two kinds of records: transactions and blocks. Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree. Each block includes the hash of the prior block in the blockchain, linking the two. Merkle tree is a tree in which every non-leaf node is labelled with the hash of the labels or values (in case of leaves) of its child nodes. 7/10/2018 3
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- 5. Blockchain A transaction is a transfer of value between Bitcoin wallets that gets included in the block chain. Bitcoin wallets keep a secret piece of data called a private key or seed, which is used to sign transactions, providing a mathematical proof that they have come from the owner of the wallet. Bitcoin -first digital currency solved double spending problem ,without the use of central server. Double Spending problem - Digital currency can be spent twice . Miners bring new Bitcoins into the world via a complex mathematical and computing process. So far 12 million Bitcoins have been mined. By 2140 there will be 21 million Bitcoin at which point creating more will become impossible. 7/10/2018 5
- 7. Language-Bitcoin Bitcoin Core, is written primarily in C++, with various resource files and scripts in other languages. There are lightweight clients like MultiBit and Bitcoin Wallet (Android), is bitcoinj. It is written in Java. 7/10/2018 7
- 8. Bit Coin 1. 1 Bitcoin equals 2,21,376.58 Indian Rupee 2. 1 BTC = 3489.48 USD 3. 3600 bitcoins mined each day. 4. Only 36 % bitcoins are active in market 5. Vancouver - boasted the world's first bitcoin cash machine Facts Denomination Subunit 10^-3 millibitcoin 10^−6 microbitcoin, bit 10^−8 satoshi Symbol BTC, XBT millibitcoin mBTC microbitcoin, bit μBTC 7/10/2018 8
- 10. Block chain -DisadvantageA bitcoin transfer is irreversible If you could attack or damage the blockchain creation tools on a private corporate server, you could effectively control 100 percent of their network and alter transactions however you wished. Bitcoin has gained the attention of the mainstream media; one way is the WannaCry ransomware created in May 2017. Bitcoins hinges on the ability to use them to purchase illegal goods. National digital currencies7/10/2018 10
- 11. Infographics Explaining How Blockchain Can Change Healthcare http://www.ancapetre.com/5-infographics-explaining-how-blockchain-can- change-healthcare 7/10/2018 11
- 12. Block Chain - Health Care 7/10/2018 12
- 13. Reference links http://davidederosa.com/basic-blockchain-programming/ https://www.pinterest.com/pin/191754896611861318/ https://www.pinterest.com/pin/717761259333241384/ https://www.intelligenthq.com/innovation-management/blockchain-5-key- concepts/ https://in.pinterest.com/pin/469007748667591817/. http://www.ancapetre.com/5-infographics-explaining-how-blockchain-can- change-healthcare https://99bitcoins.com/50-insane-facts-about-bitcoin-infographic/ 7/10/2018 13