Checking the Security of Cryptocurrency Transactions with Blockchain Technology

The question is how does blockchain technology ensure the security of transactions in cryptocurrencies. As an introduction to go deep into this topic, let me define Blockchain technology.  It is an advanced database technology that enables individuals to share transparent information over a network. 

Today’s topic is quite interesting as we will understand how blockchain technology ensures secure transactions in cryptocurrency.

Blockchain technology uses the consensus mechanism to check the transactions. Using a distributed ledger and cryptography, blockchain technology secures cryptocurrency transactions.

In this article we will explore why these are important.

Cryptographic Techniques

Digital Signatures

Digital signatures are a special type of seal for digital transactions known as a Sender’s private key. Every digital transaction has a special digital signature on the blockchain that confirms that the transaction is only initiated by the owner and the original.  

Public and Private Keys

Cryptographic keys play an important role in a cryptographic transaction as they protect from unauthorized transactions. Users have a pair of keys: a private and a public key. Only owners have secret private keys and use them for transaction signing, whereas public keys are a sort of address. The private keys ensure that the transaction is initiated by the user only and minimize risks. 

Hash Functions

A hash function converts data into a fixed-sized code, or in a set of characters like, “I love ice cream” into “ASD94”, now if someone writes “I like ice cream” the whole code will change. A small change in the input can detect the alteration. Hash functions secure the transaction just like digital signatures

Decentralized Architecture

Distributed Ledger

Distributed ledgers like blockchains are always safe, independent ways to initiate and record transactions. DLTs are also known as “distributed” because of the access of the data copies to many computers (nodes) at one time, which reduces the chances of losing or misusing data.  


After a transaction is confirmed in the blockchain it cannot be changed. If a user wants to alter the transaction they must change all of the blocks first and demand permission from the entire network, which takes a lot of time, resources, and effort. 

Consensus Mechanisms

Proof of Work (PoW)

Proof-of-work (PoW) is a standard in blockchain technology where miners solve challenging mathematical problems to confirm and add fresh blocks to the blockchain. This task can push a computer to its limit as it needs lots of processing power and calculations. PoW supports securing the network from untrustable agreements and fraud. 

Proof of Stake (PoS)

This cryptocurrency consensus mechanism is for creating new blocks in a blockchain. POS works to secure the record and validate entries into the blockchain. In the validation process, POS requires participants to have a specific quantity of cryptocurrency. Based on the cryptocurrency amount validators can create new blocks. Losing the stake makes participants honest, as they can lose their stake.   

Other Consensus Mechanisms

Delegated Proof of Stake (DPoS) and Proof of  Authority (PoA) are more from the various consensus mechanisms. The work is the same just as the rest to secure the blockchain. 

Additional Security Measures

Network Consensus

According to the rules of the network’s consensus mechanism, if an individual wants to add a transaction to the blockchain, the transaction must be verified by multiple computers (nodes) on the network. The distributed consensus ensures that no third party controls the transaction or abuses the data. 


Anyone who logs into the blockchain will see all the transactions, as there is a high level of visibility. This transparency act creates trust between the parties and a barrier wall to theft. 


Cryptographic security is a decentralized network that minimizes every point of failure, and consensus mechanisms guarantee the confirmation of solely valid transactions in the blockchain. Blockchain technology provides safe cryptocurrency transactions with the use of these combinations. 

Frequently Asked Questions (FAQs)

How does blockchain prevent double-spending?

Blockchain ensures that every transaction is distinct and unique by demanding consensus from the network to approve transactions, eliminating the chances of double spending. 

Can blockchain transactions be reversed?

Once a transaction has been entered in the blockchain then reversing it is not possible. Its immutability secures the authenticity of the transactions. 

What are the advantages of blockchain over traditional security systems?

In contrast with traditional security systems, blockchain technology has many benefits, like decentralization, transparency, security, and security. 

Is blockchain technology only used in cryptocurrencies?

Along with securing cryptocurrency transactions, blockchain technology secures the poll systems, the supply chains, and the medical facilities as well. 

How does blockchain ensure data integrity?

Blockchain produces a safe and unbreakable blockchain by using cryptographic hashing to link every block to the one before it and ensures the confidentiality of data.

Also Read: The Median Salary of a Cybersecurity Engineer Revealed | Industry Insights

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