What is A Blockchain? History of Blockchain Explained



Blockchains are databases that store information. It is very different from a typical database system. New data entered into the blockchain forms a new block and is chained to the previous block in chronological order. 

This secures the details of your transactions. A blockchain primarily stores transaction ledger data, but various types of data can be stored in blockchains.

There is no single person, entity, or corporation controlling blockchains. All users are collectively the controllers of the blockchain. This system is decentralized and the data entered cannot be tampered with, deleted, or reversed. All cryptocurrency transactions are permanently recorded and are available for everyone’s scrutiny.

What is a database?


To fully understand blockchain, you will first need to understand the concept of a database. Typically, a database collects electronic information stored on a computer system in a structured table format. This table allows for quick and easy filtering and searching for specific information.

What is the difference between a spreadsheet and a database?

There is a significant difference between a spreadsheet and a blockchain for information storage and database. Spreadsheets can be used by individuals or small groups of people to store limited information. 

At the same time, a database can hold large amounts of data, which can be easily accessed by a large number of users.

Large databases use powerful computers as servers to host information. These servers are built using thousands of computers to increase storage, capacity, and computing power so that countless users can access them simultaneously.


How is a Blockchain different from a database?


The main difference between a blockchain and a database is this structure. A blockchain assembles data into groups called blocks. These blocks are limited to a specific capacity of information retention. When these blocks are filled, they are chained to a previously filled block, forming a blockchain.

It is essential to understand that all blockchains are databases, but not all databases are blockchains. A database is designed to store data in tables, while a blockchain is designed to store data in blocks, which are chained together. 

When blocks are attached to previous blocks with a chain, they are given a timestamp and become part of the timeline. They cannot be reversed or unchained, and they are similar to being permanently etched in stone.

Decentralization


To understand blockchains properly, we will look at them in the context of Bitcoin’s implementation. Cryptocurrencies require many computers to store their blockchains. In the case of Bitcoin, a specific type of database that stores each Bitcoin transaction is the blockchain. 

Bitcoin database computers are not under one roof. And instead, each computer is operated by a unique group of individuals in different geographical locations. These Bitcoin database computers are called nodes.

Every Bitcoin node has a complete data record since Bitcoin's creation. This data is the accumulated history of all Bitcoin transactions. 

The information contained in the nodes cannot be changed because thousands of nodes contain cross-reference data to correct errors or tampering. This makes Bitcoin transaction history and its blockchains irreversible and decentralized.


Transparency


Bitcoin transactions can be viewed seamlessly by any node or blockchain explorer due to their decentralized nature. Each node has a copy of the blockchain, which keeps updating every addition to the chain. 

Any individual user can track Bitcoin transactions. This also makes the system completely secure as all hacked Bitcoin transactions are easily traceable. Stolen Bitcoins cannot be spent undetectably.

How secure is a blockchain?


The blockchain mechanism makes it completely safe and secure. Due to the storage of blocks in chronological and linear order, new blocks are continuously added to the back end of the chain. Each block has a “height” in the blockchain, which is its position. The height of the Bitcoin blockchain reached 656,197 blocks as of November 2020.

Unless the majority reaches a consensus, the content of the blockchain cannot be changed. Since there is a hash code with each block and a timestamp, these hash codes are converted into digital data by the computer’s mathematical function. 

Any change in the digital data changes the hash code, and it is instantly identified as a scam and illegal. Unless 51% of the hashcode blocks in the blockchain are changed, which is almost impossible and would require a lot of money, time, and resources as they would have to redo all the timestamps and hash codes. 

Moreover, such a major change will surely be noticed by the network members, and they would instantly create a new version of the blockchain.

History of blockchain


Blockchains are the most innovative inventions of the 21st century. The history of blockchains began in the early 1990s when Stuart Haber and W Scott described a secure cryptographic chain of blocks. 

Since then, blockchains have grown in popularity and their recent rise has increased their impact on the digital economy.

The evolution of Bitcoin and blockchains came about because of the realization that cryptocurrencies could operate independently without being influenced by a centralized authority. This led to the situation where almost every major bank is researching blockchains and using them to some extent. 

Cryptocurrency and blockchains have affected various industries from manufacturing to finance and education. A detailed history of blockchain technology is mentioned below:

Blockchains emerged when Scott Stornetta and Stuart Haber worked on a blockchain with secure timestamps so that no one could change them. In 1992, the founders upgraded their envisioned blockchain to incorporate Merkle trees to allow for more documentation on a single block, improving its efficiency.

In 2008, the first blockchain technology found its way beyond cryptocurrencies and into various applications. Blockchains began to gain relevance with the work of Satoshi Nakamoto, who designed the first relevant application to digital ledger technology. Satoshi is considered the mastermind behind blockchain technology. 

He conceptualized decentralization, where no one could take control and digital trust could be strengthened through the evolution of digital technology.

Since Bitcoin was overtaken by other core developers, there has been an evolution in digital ledger technology, which forms the history of blockchain due to new applications.


Blockchain structure


In simple terms, the structure of blockchain is a transaction record on thousands of computers and a secure peer-to-peer distributed ledger running on the internet. Updating the contents of the ledger is possible only by adding another chained block to the previous block.
In business terms, people can make all kinds of transactions without the need for an arbiter. The transparency of the database and its access to all users makes it secure.

Phase 1 of Blockchain Evolution, 2008 to 2013


Many people are confused that Bitcoin and blockchain are the same things. In reality, blockchain is an underlying technology that powers many applications, while Bitcoin is a cryptocurrency.

Bitcoin was introduced in 2008. It was known as the first application of peer-to-peer blockchain system. The genesis block was formed by Satoshi Nakamoto, from which other blocks were mined. The blocks were interconnected and chained, and they acted as proof of transactions and information.

Since the success of Bitcoin, many other applications seeking to leverage blockchain technology have emerged. Therefore, the evolution of blockchains credits a long list of newly invented applications. 

Digital transformation has led many companies to join the revolution and expand the blockchain family.

Phase 2 of Blockchain Evolution, 2013 to 2015


Vitalik Buterin believed that Bitcoin’s capabilities needed to be expanded. To leverage the capabilities of the entire blockchain, he became the first contributor to the Bitcoin database. 

Buterin wanted to invent a malleable blockchain that could perform other functions and overcome the limitations of Bitcoin. In 2013, Ethereum was born, and it included many features that Bitcoin lacked.

This public blockchain proved to be a pivotal turning point in the history of blockchains.
Ethereum was launched in 2015 and gave the blockchain the ability to support smart contracts, which could perform various functions. 

Ethereum’s additional functionality included allowing people’s assets, such as contracts, to be recorded. It transformed Ethereum from a cryptocurrency into a decentralized application platform.

The maximum number of daily transactions began to be processed in Ethereum blockchains. This expansion was due to its ability to support decentralized applications and smart contracts. Moreover, its market value has improved significantly.

Phase 3 of Blockchain Evolution, 2015 to 2017


The Linux Foundation has launched an open source blockchain technology project known as Hyperledger. This Hyperledger has contributed to the collaborative development of all distributed ledgers to date. It focuses on encouraging blockchains and improving the performance of current systems to support global commercial tractions.

In 2017, EOS was born, the brainchild of a private company known as block one. EOS emulates real computing attributes alongside GPU and CPU, unlike other blockchain protocols. This smart contract platform eliminates transaction fees in addition to conducting millions of transactions every second.

EOS is based on the 2017 release of the White Paper. Block.one distributed one billion ERC-20 tokens to ensure its wide distribution. This allowed the EOS blockchain to be launched by all users as soon as the software was released. The main goal of EOS is the deployment of the decentralized application through an autonomous and decentralized enterprise.


Phase 4 of Blockchain Evolution, starting in 2018


Before we get into the details, check out this table to see how much capital funding went into blockchain startups from 2016 to 2021

Recently, many new projects have started after the evolution of Bitcoin and Ethereum. These projects take advantage of the capabilities of blockchain technology. New projects have come up with new features that address the limitations of Bitcoin and Ethereum.

The new blockchain applications include NEO, which is an innovative contract platform. A team of developers known as Antshares in China developed it. NEO’s features included digitizing assets using a standard programming language. It is the first decentralized blockchain platform in China, even after the Chinese government banned cryptocurrency. NEO has the backing of Alibaba’s CEO and is an active currency of blockchain innovations.

Similarly, IOTA was developed to optimize cryptocurrency platforms by providing zero transaction fees and a single verification system. Bitcoin’s scalability issues are also solved through this blockchain process.

Additionally, other second-generation blockchain applications, besides IOTA and NEO, are also managing ripple effects across many industries. Many privacy altcoins offer high levels of security and confidentiality for transactions. In addition, they also solve the scalability issues of earlier blockchain platforms.

The history, as mentioned above, of blockchains includes public networks accessible to all users. Technological evolution had led businesses to adopt blockchains internally to improve operational efficiency.

Companies are looking to gain an upper hand on blockchain technology by investing in research and hiring. Companies like Microsoft are leading the exploration of private, federated, and hybrid blockchain technologies.

Conclusion


In short, the evolution of blockchain has made it possible to record, visualize, disseminate but not falsify digital information. Although launched in 1991, blockchains did not find their place in the world until 2009 when Bitcoin was launched. The cryptocurrency needed a way to record the ledger of payments and found that all its security and transparency had to be fulfilled through Bitcoin’s foolproof system.

There is no limit to the capacity and potential of blockchains in record keeping for decentralized technology. Although it seems complex, it has improved accuracy and reduced costs by eliminating third-party involvement. It offers users privacy and security through private, efficient, and transparent transaction records. Blockchains offer banking alternatives and are ideal for citizens with underdeveloped governments.

Today, a wide variety of blockchain-based projects are being initiated. They make things easy from transactions to voting because of their secure nature. Blockchains have brought a revolution and eliminated fraudulent practices because of their traceable nature. Experts claim that because of blockchains, cryptocurrency is the future of money that will abolish paper money. It will do to banks what email did to postal services.

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