What is Blockchain and How Does it Work?

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The introduction to blockchain

Blockchain is the latest technology, the interest which has grown with the recognition of cryptocurrencies. Today it’s widely discussed not only within the world of finance. Blockchain is already being employed for storing and processing personal data and identification, in marketing and computer games.

Translated, blockchain could be a continuous chain of blocks. It contains all records of transactions of any type. Unlike conventional databases, these records can not be changed or deleted, only new ones will be added.

Blockchain is additionally called distributed registry technology because many independent users store the complete chain of transactions and therefore the current list of owners on their computers. Whether or not one or more computers fail, the knowledge won’t be lost.

What is Blockchain and How Does it Work

The history of the notion of “blockchain”

The notion of “blockchain” has no national origin, it’s network “citizenship”. The history of the term began in 2008 when an anonymous person or a bunch of persons hiding under the pseudonym Satoshi Nakamoto published a piece of writing that became the manifesto of this innovative technology. The article described its essential characteristics and also the possibility of making a decentralized system of monetary settlements.

In recent years, there are many versions of who may well be the author of this manifesto. Some evidence is convincing in favor of his Slavic origin. The primary block was generated in 2009, and today there are quite 2 thousand varieties of crypto-instruments supporting various modifications of the blockchain within the world.

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How blockchain works

Blockchain may be a distributed database that contains information about all transactions administrated by system participants. Information is stored as a series of blocks. Each of them contains a specific number of transactions. What’s a distributed database? The word “distributed” means: there’s no centralized organization that will check this process.

In such a system, data can only be entered, not deleted or changed. Transactions within so-called blocks (consisting of transaction information and other metadata) are periodically added to the blockchain. This structure is termed a sequence because the metadata of every block includes a number of the data from the previous one and links the blocks together. Particularly, it includes the hash of the previous block, which works as a novel digital print.

The chance that two pieces of information will offer you the identical hash result’s incredibly small. That is, if someone tries to vary the old block, its hash will change, which implies that the hash of the subsequent block will differ, and so on. Therefore, it’s very easy to grasp whether a block has been changed because all the blocks following it’ll be changed. Anyone can verify transactions and signatures using public-key cryptography. It’s impossible to covertly falsify data within this method, so it’s recognized as corruption-resistant.

The blockchain analogy could be a necklace. Each bead could be a “block” or record of an action. This necklace or “chain” can not be destroyed. Thus, the blockchain is an indestructible digital record of actions. The reliability of this technique has allowed it to be accustomed to improving the efficiency of cash transactions and knowledge exchange among individuals, corporations, and even the general public sector.

Blockchain’s spheres of application

The introduction of the blockchain increases the speed of exchange, reduces time costs, and improves the standard, reliability, and availability of services. This increases transparency and reduces risks. The blockchain system is employed in many areas:

1. Cryptocurrency

In the crypto industry, blockchain has become the technological basis for issuing cryptocurrencies, which are a modernized version of Hayek’s “private money”. At the identical time, the biggest of them, like bitcoin and ether, have a worldwide circulation.

2. Banking

Blockchain makes all processes within the industry safer, more reliable, and more transparent. Money transfers, settlements in securities transactions, letters of credit, KYC compliance, the routine work of bank back offices – these operations are now happening with the introduction of this technology. Blockchain can cut bank costs by up to 50%. It could optimize the infrastructure, drastically cut costs, and supply the desired RoE boost for banks.

3. Cyber security

Each node of the blockchain system stores copies of the complete database as a full, and they are checked against one another. This provides the system viability even in the case of successful hacker attacks on its single nodes. Although blockchain applications offer anonymity, the technology will be accustomed attach real identities to cryptographic ones during a database.

4. Identification

Such IDs represent the transfer of non-public data from a few people to the blockchain and also the creation of his digital profile. There’s an oversized list of public services which will be accessed through the blockchain, and there are statistics from advanced blockchain countries. The employment of blockchain and blockchain-ID by a full-of-life citizen can become a typical pattern of behavior already during the lifetime of the trendy generation.

But besides this, blockchain projects are utilized in the realm of economic services, payment services, the general public sector, transport and logistics, healthcare, energy, etc.


A blockchain could be a database with transactions, consisting of a sequentially built chain of digital blocks, each of which stores information about the previous and next blocks. Blockchain is required where the speed and reliability of knowledge transfer are important- that is, in almost any area of our life. Now blockchain is being implemented in many areas.

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