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Role of Blockchain in Cyber Security

Sushree Sasmita Dash
Assistant Professor, CSE, Kalinga University, Raipur

Blockchain has emerged as a powerful technology that has the potential to revolutionise the way digital
information is stored and shared. As an immutable, secure and reliable form of digital ledger technology,
blockchain is transforming the cyber security landscape. Blockchain technology is being used to secure critical
infrastructure and data, as well as to protect against malicious actors and cyber-attacks. With its distributed and
decentralised nature, blockchain can provide a secure, scalable and cost-effective solution to protect digital assets
and data.
The use of blockchain in cyber security applications is still in its infancy, but the technology is already being used
in a variety of ways. For example, blockchain-based authentication can be used to verify the identity of users and
protect against identity theft. Blockchain can also be used to secure data storage, as the distributed and
decentralised nature of the technology makes it more difficult for hackers to access data. In addition, blockchain
can be used to secure the transfer of data between different parties. By keeping a distributed ledger of all
transactions, blockchain can help ensure that data is only transferred to authorised parties and that data remains
secure. Finally, blockchain can be used to create trust less, autonomous systems, which can help defend against
malicious actors and cyber-attacks.
Advantages of Blockchain in Cyber Security
1. Stronger Data Integrity: Blockchain technology uses cryptographic techniques to ensure data integrity. It
maintains a distributed ledger of data that is transparent and immutable, meaning it cannot be altered without the
knowledge and agreement of the network. This helps protect against malicious attacks and data tampering.
2. Increased Transparency: Blockchain technology provides a decentralized, distributed ledger that is transparent
and traceable. Every transaction is logged and stored on the blockchain, creating a digital audit trail. This helps to
ensure that data is accurate and secure.
3. Improved Authentication: By leveraging cryptographic techniques, blockchain technology can be used to
securely authenticate users and devices. This helps to prevent malicious actors from gaining access to a network
or system.
4. Faster Transaction Processing: Blockchain technology can be used to facilitate faster transactions by
eliminating the need for a third-party intermediary. This can help to reduce transaction costs and processing times.
5. Increased Data Security: Blockchain technology can help to protect data by making it immutable and tamperproof. This helps to reduce the risk of data breaches and unauthorized access.
Limitations of Blockchain in Cyber Security
1. Lack of Privacy: Blockchain technology is designed with a public and transparent ledger, meaning that all
transactions and data stored on the blockchain is publicly visible. This can be a major issue for businesses that
need to keep sensitive data private.
2. Scalability: Blockchain technology is still in its infancy and has yet to be tested at scale. It’s not yet known how
blockchain can handle the large amounts of data and transactions that will be necessary in a global economy.
3. Cost: Building and maintaining a secure blockchain network can be expensive. High energy and computing
costs are necessary to keep the network secure and running.
4. Limited Use Cases: Blockchain is a relatively new technology, and therefore only has limited use cases. This
can be a limitation when it comes to using blockchain for cyber security as it’s not yet clear how it can be used to
protect against all types of cyber threats.
5. Security: Although blockchain is secure, it can still be vulnerable to hacking and other forms of cyber-attacks.
As the technology is still new, it can be difficult to anticipate all potential security threats.

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