Sunday, August 25, 2019

Blockchain Technology

What is Blockchain?


Blockchain Technology

Meaning of Blockchain: -


Blockchain, originally a block chain, is a growing list of records, called blocks, that are linked using cryptography. Each block contains the cryptographic hash, timestamp, and transaction data of the previous block.

“A system in which records of transactions made in bitcoin or any other crypto currency are maintained on multiple computers that are connected to peer-to-peer networks.”

What Is Blockchain: -


Blockchain distributes digital information on the Internet, but does not allow permission to copy or modify it, thus blockchain technology has created the backbone of a new type of Internet. Originally designed for digital currency, bitcoin, the tech community is now finding other possible uses for the technology.
Bitcoin has been referred to as "Digital Gold" for a decent reason. To date, the whole price of the currency is about to US $ 112 billion. And blockchains can create other types of digital value. Like the Internet (or your car), you do not need to know how the blockchain uses it. However, basic knowledge of this new technology will help you understand why it is considered revolutionary. So, we hope you enjoy it.


Why is it Called “Blockchain”?


The name of the blockchain depends on how it works and the way in which it stores data, ie information is packed into the block.

Blockchain Technology


This links with other blocks of similar information to form a chain.

Blockchain Technology


It is the act of connecting blocks in a chain that makes store information on a blockchain so reliable. Once the data has been entered into a block, it cannot be changed without changing each subsequent block, making it impossible to do so without being seen by other participants on the network.

For example,
in a transaction such as 1 Lisk, the tokens being sent from Tina to Bob, as well as the timestamp of when that information was recorded. It will also include a digital signature associated with the account that created the recording and a unique identification link in the form of a hash (think of it as a digital fingerprint), in the previous block of the chain.
It is the link that makes it impossible to change any information or to insert a block between two existing blocks. To do this, all the following blocks will also need to be edited. As a result, each block strengthens the security of the previous block and the entire blockchain as it means that more blocks have to be replaced to tamper with any information.
When combined, they all constitute an undisputed storehouse of information, one that cannot be declared disputed or untrue

What is Blockchain Technology: -


Blockchain is additionally a shared distributed ledger technology throughout that every and each dealing is digitally signed to verify its legitimacy and integrity – and is prepared to bring major changes in a very wide range of business use cases.

“At its most basic level, blockchain literally means just a series of blocks, but not the traditional meanings of those words. When we say the words “block” and “chain” in this context, we are actually talking about store digital information (“block”) in a public database (“chain”).”
The “block” on the blockchain is made up of digital pieces of information. In particular, they have three parts:

1) Store information about block transactions, assuming the date, time and the amount of rupees of your most recent purchase from Amazon. (Note: This Amazon example is just for you to understand; Amazon does not work on the retail blockchain principle)

2) The block stores information about who is participating in the transaction. One block to your great purchase from Amazon is your name on Amazon.com, Inc. Will record with Instead of using your real name, your purchase is a unique “digital signature”, like a user name, without entering any identifying information.

3) Stores block information which distinguishes them from other blocks. Many people, like you and me, have names to distinguish us from each other, each block stores a unique code called a “hash”, which allows us to distinguish it from every other block. Suppose you made a great purchase on Amazon, but when it is in transit, you decide that you need one more. Although the details of your new transaction will be the same as your prior purchase, we can tell the blocks differently due to their unique code.

While the block in the example above is being used to store single purchases from Amazon, the reality is slightly different. A single block on the blockchain will really store up to one MB of data. Depending on the size of the transaction, this means that a single block may have a few thousand transactions under one roof.

Who is Created Blockchain?


The first recorded mention of blockchain technology came in a document, or whitepaper, published in 2008 by the mysterious founder or founders of bitcoin, known simply as Satoshi Nakamoto. The speculation of the true identity of this undeniably brilliant coder continues today, with Nakamoto claiming in the initial letters of a Japanese-born man on 5 April 1975.
However, due to their decision to document the mastery of bitcoin and language in English, the general perception in the blockchain community is that Nakamoto is of non-Japanese origin and that they are either European or North American.
As a blockchain, and as transparent as a bitcoin network, one can see Satoshi Nakamoto's bitcoin holding. He is currently known to hold around one million bitcoins.
There are several theories as to why Satoshi Nakamoto chose to remain anonymous, although the general consensus is that he was a timid developer who did not care about the things that would undoubtedly come with creating such disruptive technology.
It is also worth knowing that Satoshi Nakamoto did not create every aspect of the blockchain from scratch. In fact, none of the technologies used in the blockchain were particularly new and had been around for many years. However, this happened when it was used in combination with one another to describe where blockchain technology goes, and it became a revolutionary offering.

How does Blockchain work?


Imagine a SpreadSheet  that's duplicated thousands of times across a network of computers. Then imagine that this network is designed to update this spreadsheet regularly and you have a basic understanding of blockchain.

Information placed on a blockchain is shared - and exists as a continuous reconciliation database. It is a way of using the network that has obvious benefits. The blockchain database is not stored in a single location, which means that the records it holds are actually public and easily verifiable. There is no central version of this information to corrupt for a hacker. Hosted by lots of computers at the same time, its information is accessible to anyone on the net.
It can be known in depth with the analogy of Google spreadsheet, I would like you to read this piece from this blockchain expert-

Blockchain Technology

When a new transaction or an existing transaction comes into the blockchain to be edited, usually within a blockchain implementation most nodes must execute an algorithm to evaluate and validate the history of individual blockchain blocks. If most nodes have a consensus that history and signature are valid, a new block of transactions is accepted in the ledger and a new block is added to the chain of transactions. If the majority does not accept additions or modifications to the laser entry, it is rejected and not added to the series. This distributed consensus model is one that allows the blockchain to run as a distributed ledger without the need for something central, telling the authority whether the transactions are legitimate (and more importantly) those that are not.



Advantage of Blockchains: -


Blockchain is attractive to various constituencies for several reasons, including:

The lack of a central authority requirement makes it an ideal ledger and settlement solution for joint ventures and associated relationships that are typically built on the same or 50/50 footing without the provision of an intermediary or manager. Indeed, computers verify and dispose of transactions, eliminating the need for clearinghouses and other settlement agents, providing seamlessness in a business system and generally reducing costs by improving the speed at which Transactions, verification, settlement and recording can be done.

Digital signature and Verify make it difficult to imagine a scenario in which a bad hacker can lead to fraud and present problems that are costly to remove and solve. The cryptographic integrity of the entire pending transaction, as well as the examination by multiple nodes of the blockchain architecture, the prevention of threats and the malicious use of technology. (It is important to note that this security protection is largely untapped in the market and, despite being strong on theoretical grounds, the question is how well the reality of the digital economy we live in today.)
The concept of blockchain works really well on tracking how assets move through the supply chain, through some vendors and factories to transmission and transportation lines and into their end locations.

Disadvantage of Blockchain Technology: -


The biggest problem now with blockchain technology is that it is difficult to implement, because, as is typical with open source projects, they have many projects with their own teams and ideals. It is difficult to have all the functionality in a practical application. The only thing that pauses about blockchain is the community that builds the code. Bitcoin is open source, but the team managing it does not behave the way you would ideally like FOSS maintainers to maintain. They behave like any 'proprietary software team accountable', and this does not bode well for anyone using the blockchain implementation of bitcoin.

Who will use blockchain?


As a web infrastructure, you do not need to know about blockchain to be useful in your life.
Currently, finance provides the strongest use cases for technology. For example international remittances. The World Bank estimates that more than $ 430 billion of funds were transferred in 2015. And blockchain developers are in high demand at the moment.
The blockchain potentially cuts off the middleman for this type of transaction. Personal computing became accessible to the general public with the invention of the graphical user interface (GUI), which took the form of a "desktop". Similarly, the most common GUIs designed for blockchain are so-called "wallet" applications, which people use to buy things from bitcoin, and store it with other cryptocurrencies.
Online transaction is closely linked to identity verification processes. It is easy to imagine that wallet apps will incorporate other forms of identity management in the coming years.

Applications of Blockchain Technology:


Applications of blockchain technology in various industries

Blockchain technology can be used in many industries including financial services, healthcare, government, travel and hospitality, retail and CPG.

i) Financial Services:


In the Finance services sector, blockchain technology has already been enforced in several new ways that. Blockchain technology simplifies and streamlines the entire process of asset management and payments by providing an automated business lifecycle where all participants will have the exact same data access about the transaction. This removes the need for brokers or middlemen and ensures transparency and effective management of transactional data.

ii) Healthcare:


Blockchain can play a significant role in the healthcare sector by increasing the privacy, security and interoperability of healthcare data. It has the ability to meet many underchallenges in the sector and enables secure sharing of health data among various institutions and process people. This eliminates any third-party interference and also avoids overhead costs. With blockchain, healthcare records can be stored by encrypting them in a distributed database and implementing digital signatures to ensure confidentiality and authenticity.

iii) Government:


Blockchain technology holds the power to transform government operations and services. It can play an important role in addressing the challenges of data transaction in the government sector, which currently works in silo currency. Proper linking and sharing of data with blockchain enable better management of data across multiple departments. This improves transparency and provides a better way to monitor and audit transactions.

iv) CPG and Retail:


There is a huge opportunity to implement blockchain technology in the retail sector. This includes everything from ensuring the authenticity of high-value goods, preventing fraudulent transactions, detecting stolen goods, enabling virtual warranties, managing loyalty points, and streamlining supply chain operations.

v) Travel and Hospitality:


Blockchain applications can make fundamental changes in the travel and hospitality industry. It can be applied in money transactions, storing important documents like passport / other identity card, reservation and travel insurance, loyalty and rewards.

How Blockchain Technology Works:



All these people around you, who have bitcoin. According to a 2017 study by the Cambridge Center for Alternative Finance, the number could be up to 5.9 million. Explain that one of those 5.9 million people wants to spend their bitcoins to buy groceries. This is where the blockchain comes from.
When it comes to printed money, the printed currency is regulated and verified by a central authority (usually a bank or government) - but bitcoin is not controlled by anyone. Instead, transactions made in bitcoins are verified by a network of computers.
When one person pays another for goods using bitcoin, the computer in the bitcoin network verifies the transaction. To do this, users run a program on their computer and try to solve a complex mathematical problem called "hash", when a computer solves the problem by a "hashing" block, its algorithmic work Transactions of the block must also be verified. The entire transaction is recorded publicly and stored on the blockchain as a block, at which point it becomes immutable. In the case of bitcoin, and most other blockchains, computers that successfully verify blocks are rewarded for their work with cryptocurrencies.
Although transactions are publicly recorded on the blockchain, there is no user data - or, at least not entirely. To perform a transaction on the Bitcoin network, participants have to run a program called "Wallet". Each wallet has two unique and unique cryptographic keys: a public and a private key.

Blockchain Technology


Public keys are the place from where the transaction is deposited and withdrawn from it. Along with this, there is also a key that appears on the blockchain ledger as the user's digital signature.
If a user receives a payment in bitcoin for their public keys, they will not be able to withdraw it with private keys. A user's public keys are a smaller version of their private keys, created through a complex mathematical algorithm. However, due to the complexity of this equation, it is almost impossible to reverse the process and generate a private key from the public keys. For this reason, blockchain technology is considered confidential.


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