With the growing popularity of the cryptocurrency market, most Internet users have already encountered or heard about the term "blockchain". Most often, this term is associated with bitcoin or other cryptocurrencies, but many people do not even realize that blockchain is a unique technology that can be used in all spheres of modern life.
In this article, we will analyze what blockchain technology is and how it works, in addition, you will learn how this technology can optimize our daily routine.
- Important names in the history of technology creation
- How the blockchain technology works
- 3 pillars of blockchain technology
- Decentralization
- Transparency of blockchain technology
- Immutability
- Applicability of the technology
Important names in the history of technology creation
The history of the blockchain, as many believe, did not begin with the appearance of bitcoin. Before this technology became the basis of cryptocurrencies, it had a modest beginning as a concept in computer science, especially in the field of cryptography and data structures.
A very primitive form of blockchain was the hash tree, also known as the Merkle tree. This data structure was patented by Ralph Merkle in 1979 and functioned by checking and processing data between computer systems. In fact, this technology was used to maintain and confirm the integrity of the data to be exchanged.
In 1991, the Merkle tree was used to create a "secure block chain" – a series of data records, each of which was associated with the previous one. The newest entry in this chain contained the history of the entire chain.
Another harbinger of the emergence of blockchain technology is the development of American scientists Scott Stornette and Stuart Haber. While working on another project, scientists have found a way to protect the history of changes to the data registry from fakes. They came to the conclusion that instead of one common registry, the system can have many separate but interconnected copies of the same registry.
In 1991, scientists published a scientific paper "How to create a timestamp in a digital document" in the Journal of Cryptography. The technology described in the article was called blockchain. A distributed electronic registry stores data in digital groups with timestamps called blocks. Each block includes a specific code called "hash".
The hash of each spent block also appears in the next block. That is, to change one block, you will have to change all the related ones. These cryptographic dominoes work together to protect against counterfeiting and fraud.
A little later, in 1994, Stornette and Haber founded Surety, which, as an additional security measure, began publishing an alphanumeric code summarizing the weekly additions of blockchains in analog form in The New York Times newspaper. Thus, the developers tried to protect the data from fraudsters, believing that the information published in the newspaper can no longer be changed.
The scientific works of Stornette, Haber and Merkle did not receive due recognition at the time. After some time, their concept was developed and brought to the world level by one of the most mysterious people of recent years, programmer Satoshi Nakamoto. It was he who introduced the blockchain to the whole world in the form in which it is known to us today.
In 2008, his concept eventually became the basis for the creation of bitcoin.
Satoshi Nakamoto conceptualized the distributed registry a little, solved some technical issues that previously did not allow the technology to work. Satoshi also introduced the concept of "cryptocurrency mining", which created financial incentives for participating in the maintenance and verification of blocks in the blockchain.
It is worth noting that the contribution of Stornette, Haber and Merkle did not go completely unnoticed. Their scientific works are listed in the list of references to the Bitcoin WhitePaper.
How the blockchain technology works
The development of Satoshi Nakamoto has been bringing a revolution not only to the Internet space for 10 years, but also finds its application in many branches of modern life.
Blockchain technology allows you to speed up the process of making payments and money transfers. Thanks to the blockchain, you can make a payment anywhere in the world in a matter of minutes and at the same time not worry about the security and confidentiality of data.
The information stored in the blockchain exists in the form of a common and constantly verified database. The shared database is not stored on a single server, its copies are stored on millions of computers connected to the system, which certainly reduces the risk of vulnerability to hacker attacks.
Many experts draw an analogy between blockchain technology and the well-known Google Docs service. Using this service, two or more users have access to the same document, while both parties can simultaneously make adjustments to it, thereby updating the shared file. The same thing happens in the blockchain. The distributed part comes into play when several people participate in the exchange.
If you do not go into complex technical details, then you can imagine the blockchain technology in the form of a special database that stores information about transactions of network participants. All transactions are combined into blocks, which, in turn, are linked using the hashing function. Each new block has a link to the previous one, due to which a chain of blocks is formed in the network. Thus, a constantly updated database is formed from a common block chain, into which an unlimited number of transactions can be entered.
We also advise you to watch our detailed video, from which you will learn more about cryptocurrencies and blockchain:
3 pillars of blockchain technology
Blockchain technology has a lot of features and advantages. But there are 3 main secrets that have made this technology truly unique:
- Decentralization;
- Transparency;
- Immutability.
Decentralization
Before the advent of blockchain technology, users used to face centralized services on a daily basis. Banks are an excellent example of a centralized system. In order to make a transfer of funds from your account, you can not do without the services of a bank.
The idea of a decentralized network is to save users from the need to use third-party services, as in the situation with banks. If you want to send your money to someone, you can do it at any time without involving third-party intermediaries. Decentralization means that the network operates from user to user (or a peer-to-peer network).
Transparency of blockchain technology
There is always a lot of discussion around this option. On the one hand, blockchain technology gives users privacy, and on the other – full availability and transparency of information on the network. How can this be? Let's take it apart.
The identity of each network user is encrypted using complex cryptography and is represented only by a public address. That is, if you need to look at the transaction history of a particular user, you will not see the expected "Alice sent 1 BTC", instead you will see "1WR6uojYKmSwwr9opLPUtreI8IopGt7KNV sent 1 BTC".
Despite the fact that the identity of users is encrypted, the network provides an opportunity to see all transactions that were carried out at a specific address. Thus, the simultaneous confidentiality and transparency of the network is obtained.
This property is essentially unique and has not been previously provided by any service in the financial sector. Each of your transactions can be rechecked at any time. This adds a necessary level of accountability, which is so lacking in some large institutions.
Immutability
The blockchain network is designed in such a way that each new record in the database is associated with the previous one. Making any changes or additions to the blocks entails changing all other blocks. In this case, all subsequent blocks after the change will be declared invalid.
In fact, this is a powerful cryptographic data protection that is used inside the network. This property is one of the most valuable in blockchain technology.
Data protection from changes is implemented thanks to the hashing function. This function involves converting incoming data of any length into outgoing data of a fixed length. Thus, all transactions in the network are reliably protected.
Applicability of the technology
During its existence, the blockchain technology has managed to prove its versatility and practicality. Many scientists and developers have worked and continue to work on studying the technology, developing this technology and introducing it into our daily life.
Blockchain technology has become the basis for the entire cryptocurrency market. Bitcoin and hundreds of other cryptocurrencies based on this technology have become a unique means of payment, which is gaining more and more popularity and solves such important problems of the financial sphere as privacy, data protection and the cost and speed of transaction processing.
After a huge success in the cryptosphere, the blockchain began to find application in many other areas. Most often, this technology is used when it comes to the need to store a large array of data and confirm the reliability of information.
So, already now the entire banking sector is puzzled by at least partial implementation of this technology in order to reduce transaction costs, make them safer and thus increase customer loyalty.
In addition to the banking sector, blockchain is well applicable in management and law, healthcare, real estate, energy, and so on.
Blockchain technology, in theory, can completely displace intermediaries from our lives. Pension system, notary, realtor and law offices and other organizations that currently require certification of the authenticity of events. And due to transparency and immutability, this decentralized system is potentially capable of destroying corruption and various kinds of fraud.Star
There are more and more conversations around the automation of the voting process through the blockchain. The technology will help make this process anonymous and as safe as possible, protected from fraudulent actions. Last year, the world's first blockchain–based presidential election was held in Sierra Leone. Blockchain technology helped in the counting of votes. Through its use, the Government of the country showed that the elections were transparent and fair.
A unique example of using blockchain is the Brazilian startup Bitnation, which can help solve the problem of refugees from the Middle East without documents. The governments of the EU countries were asked to register all refugees on virtual passports in the blockchain.
Despite the general interest in the technology, in practice, many are still afraid to use this innovation. Most likely, this is due to the factor of distrust and a weak understanding of the prospects of the blockchain. Many large companies are afraid of this technology due to the lack of a legislative framework that could regulate actions on the network. In addition, it is very difficult to make operational decisions in the network, as is often required in a business environment. To make even minimal changes, it is necessary to obtain the consent of more than half of all miners of the network. This feature leads to another problem-there is no single person responsible for what is happening in the network, the responsibility is exclusively collective.
Thus, blockchain, like any other technology, has its own problems and advantages. But now we can say with confidence that this technology will not just disappear over the horizon, but will continue to make its way into our everyday life and very soon it will become as familiar to all of us as cellular communications and the Internet.