The term blockchain is a common term for modern digital technology enthusiasts. The urge for accountability of data and record keeping largely catalyzed the emergence of this technology.
The simplest definition for blockchain technology is that it is a decentralized, distributed ledger that records the history of data from a digital asset. This piece will equip the reader with what blockchain technology is all about, its history, and how it is used. Blockchain is also known as Distributed Ledger Technology (DLT), it is used to make the provenance of a digital asset to be transparent and to make sure that it cannot be altered by anyone. This is achieved through what is known as decentralization.
A very easy way to understand the operation of blockchain technology is by linking it to a computer document. When a document is created and distributed to a group of people, the document is not transferred or copied to the group of people, instead, it is distributed simultaneously to everyone in the group. This brings about a form of decentralized distribution that makes it possible for everyone in the group to access the document at the same time. A group participant does not have to wait for another participant to view and make changes, changes made by any of the group participants are recorded in real-time and they are transparent. However, blockchain technology is far more complicated than a computer document but the illustration perfectly fits because it brings out three major ideas of blockchain technology, which are
- Assets are not transferred or copied, rather they are distributed
- Assets are decentralized
- Changes are transparent, thereby protecting integrity and securing the document which builds trust in the asset.
Blockchain technology is a promising and fast-rising technology, owing to the fact that it eliminates fraud, reduces the risk of cybercrimes and brings about the transparency of data transfer and transactions, and can be used in numerous fields of life.
The major reason for the adoption of blockchain is to promote in cases of data transfer, internet transfers, and transactions due to its high level of security.
There are three major concepts that make up a blockchain, blocks, miners, and nodes.
Blocks: there are numerous chains present in every block and each block consists of three basic elements: the data in the block, a nonce made up of a 32-bit whole number which is randomly formulated the moment a block is created, and a hash, which is a 256-bit number linked to the nonce and must begin with so many numbers of zeros. The nonce creates the cryptographic hash after the first block of a chain has been created, the block is then signed and remains tied forever to the hash and nonce until it is mined.
Miners: miners are professionals that create new blocks on a chain via a process known as mining. There are a unique nonce and hash to every block in a blockchain and they reference the hash of the preceding block. With the use of high tech software, miners solve complex arithmetic problems known as cryptographic, to find a nonce that creates an accepted hash. There are about four billion nonce-hash that must be mined before miners would find the golden nonce and their new block is then added to the chain. This is because the nonce has 32 bits and the hash has 256 bits. To make a change or alteration to any block, re-mining is required not only to the block that needs to be altered but to all other blocks after it, this is the reason why it is difficult to manipulate blockchain technology. Miners are rewarded financially when a block has been successfully mined.
Applications of Blockchain technology
There are numerous blockchain applications in various industries worldwide. Blockchain technology can be used to track financial fraud, sharing of patients medical records securely, and for tracking down intellectual property theft and business rights
Although blockchain is a modern technology, it is one that has so many successful achievements in the fields where it has been used.
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