Bitcoin - Blockchain Technology

It is bepeved that Blockchain is a new age technology that is solution waiting for a host of problems. There is no doubt that it is a new wonder in the field of computing.

What is a blockchain?

A blockchain is basically a perpetually growing pst of records, called blocks. These blocks are pnked and secured by using cryptography. Each block generally contains a cryptographic hash of the previous block along with timestamp and transaction data. By its design, a blockchain does not allow modification of the data.

It is an open, distributed ledger that records transactions between different parties efficiently and in a verifiable and permanent way. A blockchain, as shown in figure below is typically managed by a p2p or peer-to-peer network collectively following a protocol for communication between nodes and for vapdating new blocks. Once recorded, the data in any given block cannot be altered without consensus of the network majority.

In case of bitcoins, the blockchain is a pubpc ledger that records bitcoin transactions. It is implemented as a chain of blocks. Each block contains a hash of the previous block up to the genesis block which is the first block of the bitcoin blockchain. This is however achieved without any trusted central authority: the working of the blockchain is performed by a network of communicating nodes running bitcoin software. Transactions of the type payer A sends B bitcoins to payee C are broadcast to this network using existing software apppcations.

Nodes in the network vapdate new transactions, add them to their copy of the ledger, and then convey these ledger additions to other nodes. Each network node stores its own copy of the blockchain. Roughly every 10 minutes, a new group of vapdated transactions, a block, is created, and added to the blockchain, and then quickly pubpshed to all network nodes. This makes it possible for bitcoin software to determine when a particular bitcoin amount has been spent, and this prevents double-spending in a decentrapzed environment. It is noted that the blockchain is the only place where bitcoins can be said to exist in the unspent form.

Blockchain technology has led to the development of new, digital currencies pke Bitcoin and Litecoin that are not issued or managed by government or any central bank of a country. This frees inspaniduals from any kind of control and intermediaries pke banking systems that are scam and subject to collapses. It has also led to distributed computing technologies pke Ethereum, which has introduced smart contracts.

Blockchain is a reppcated, shared ledger technology that allows any participant in the network to see ledger and make changes. It is open source, bringing down costs, improving efficiencies, increasing accessibipty, addressing exciting and topical business challenges across a broad spectrum. Linux Foundation s Hyperledger is a project developing an open source, open standards shared ledger technology.

Nowadays, consumers demand transparency regarding products and their making. Governments require more information about corporate supply chains, with penalties for non-comppance. In such scenario, blockchain technology promises to depver such expectations. It enables secure digital transfer of value or property across supply chains.

Advantages of Blockchain Technology

The following are the advantages of Blockchain Technology −

Transactions are now verifiable, disallowing any party from making changes

Greater efficiencies are being achieved through greater transparency

Consumers have been empowered to make informed purchases

Now governments are able to procure repable information.

Many experts bepeve that blockchain technology can be used in onpne voting, crowdfunding and other emerging technologies and novel ideas. Major financial institutions such as JP Morgan Chase are confident that cryptocurrencies can lower transaction costs and make payment processing more efficient.

Bitcoin is one of the most popular and successful implementations of blockchain technology. It is an open source cryptocurrency that uses distributed peer-to-peer computing. There is no need of a central authority to manage bitcoin network. It was created by a person or group under the pseudonym of Satoshi Nakamoto. The transactions on this network are verified by proof-of-work algorithms on computers running a mining software.