বাংলায় পড়ুন | Researchers and Reporters: Shama Sultana Anika Taieba |
In this age of information technology, our lives have been considerably easier. But this has also raised worries about safeguarding users’ privacy and security. Blockchain is a modern solution for this. A secure database that all network users share is called a blockchain. Distributed Ledger Technology is a distributed database where members share the authority to add or modify data. Blockchain becomes more effective and safe with this technique.
How Blockchain Works
In a blockchain, data is saved in “blocks” when added or modified. For this reason, it is known as a blockchain. An immutable chain is formed by systematically connecting each block to the one before it. Data is systematically and permanently recorded by this chain, creating an ideal audit history for a later time.
A consensus mechanism requires consent from most of the network’s nodes before adding data to this chain. No one has the authority to add or modify information from any place. These include the Proof of Stake and Proof of Wory.
Key Features of Blockchain
- Cryptographic Security: Two cryptographic keys—the public and the private keys—are needed to access or upload data to the blockchain.
- Digital Ledger: The blockchain is an all-inclusive online database.
- Distributed Network: Both private and public networks can share the blockchain.

The core features of blockchain that make it secure and reliable. | Photo collected.
Application Domains for Blockchain
Due to its broad range of applications, blockchain technology has the potential to significantly alter many different sectors and industries. Its primary applications include:
- Cryptocurrency:
Blockchain is most commonly used concerning cryptocurrencies like Ethereum and Bitcoin. Without the need for intermediaries, it enables safe, transparent transactions.
- Smart contracts:
Automated contract execution is accomplished using blockchain. With this approach, when certain requirements are satisfied, a contract is automatically executed. For instance, the automatic resolution of insurance claims.
- Supply chain management:
Blockchain makes tracking the supply chain easier. It guarantees product quality, provenance, and supply transparency.
- Data security:
To guard against data leaks and cyberattacks, blockchain encrypts data and keeps it in an immutable, permanent ledger.
- Healthcare:
Patient medical records are kept safe and easily accessible through the usage of blockchain technology. Both data sharing and confidentiality are aided by it.
- Electoral system:
A transparent and safe voting process can be made possible using blockchain. It improves the accuracy of results and guarantees voter identity.
- Fintech and banking:
Blockchain speeds up and lowers the cost of cross-border financial transactions. In the banking industry, it is also utilized for accounting and lending.
- Digital identity management:
Blockchain is essential for safeguarding a person’s online persona. Identity theft can be effectively prevented by it.

Enhanced digital identity management and secure data storage through blockchain. | Photo collected.
Challenges and Future
Blockchain technology has a lot of potential, but it hasn’t yet shown to be widely effective. Its spread is being constrained by its complexity, high energy consumption, and rival technologies. However, blockchain has the potential to democratize data in the future. Furthermore, blockchain will contribute to the provision of solutions across a range of industrial domains.
In conclusion
Blockchain technology makes it possible to store and exchange data in a distributed, transparent, and safe way. When used correctly, it will guarantee security and transparency in addition to improving dependability and efficiency.
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