A blockchain, previously known as the blockchain, is a growing list of records called blocks, which are linked using cryptography. Each block contains the previous block’s cryptographic hash, a timestamp, and transaction data (usually represented as a Merkle tree). A blockchain is resistant to the changes in the data by design. It is a distributed and open ledger that can effectively and verifiably and permanently record transactions between two parties. A blockchain is typically managed for use as a distributed ledger by a peer to peer network that adheres collectively to an inter-node communication protocol and modern desktop training.

Once recorded, it is not possible to alter the data in any given block retroactively without altering all subsequent blocks, which demands consensus of the network majority. Although records of the blockchain are changeable, blockchains can be considered secure by design and exemplify a distributed system of computing with a high tolerance of byzantine faults. Therefore, a blockchain has been claimed for decentralized consensus.


It is possible to integrate blockchain technology into multiple areas. Today’s primary purpose of blockchains is for cryptocurrencies as a distribution ledger, most notably bitcoin. Companies have been reluctant to place blockchain at the heart of their business structures. Uses of blockchains are diverse:

  • Video games.
  • Smart contracts.
  • Supply chain.
  • Cryptocurrencies.
  • Financial services.

Blockchain technology can also be utilized to create a free, permanent, transparent ledger system to collect sales data, track digital usage, and pay content creators.


The blockchain’s invention for the bitcoin made it the first digital currency to solve the problem of double-spending without the need for a central server or trusted authority. The design of bitcoin has inspired other apps, and cryptocurrencies are widely used by blockchains that are readable by the public. Blockchain is imagined as a type of modern desktop courses. It has been proposed to use private blockchains for business purposes. Sources like Computerworld called the marketing of such blockchains without proper security model a “snake oil.”


  • It is a precise, transparent technology.
  • Its aspect of decentralization makes it more difficult to manipulate or tamper with.
  • Offers secure, efficient, and private transactions.
  • Delivers improved accuracy by eliminating the involvement of humans with the verifications.
  • Reduces costs by eliminating verification by third parties.


  • Blockchain has a history of being used in illegal activities.
  • Vulnerable to hacking.
  • There is a significant cost of technology associated with bitcoin mining.
  • It has low per second transactions.


Blockchain is the digital currency (Ethereum, Bitcoin, Litecoin, and the like) underpinning technology. The tech allows the distribution of digital information, but not copying. That implies that only one owner can have each piece of data. You may hear it being explained in a distributed network as a “digital ledger.” Therefore, blockchain will be used in the future for more than just currency and transactions.