How Secure Is Blockchain?

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Although many firms tout blockchain technology as a secure platform, there is much more to explore when it comes to its security. According to the Fortune Business Insight report, the blockchain market was at US$ 4.67 billion in 2021 and rose to US$ 7.18 billion in 2022. The study projects that the market will touch US$ 163.83 billion by 2029. While the growth hints at increasing adoption, concerns about blockchain security remain.

Blockchain technology and blockchain security

Blockchain is a secure, immutable ledger that enables the storage of information regarding digital asset ownership within an efficient consensus-based network. It ensures data remains decentralized and accessible to all users at any given time. Blockchain technology is an advanced system that utilizes a distributed ledger which cannot be modified. The speed of obtaining the data is critical to its accuracy, but this innovative solution also guarantees the integrity, fidelity, and security of digital records within it – all without needing a third-party administrator!

There are four distinct blockchains types: 

  • Public blockchain

  • Private or managed blockchain

  • Consortium blockchain

  • Hybrid blockchain

Blockchain is the ideal technology to provide shared and secure information. It offers immediate and completely transparent details about a digital transaction stored on an immutable ledger. These immutable ledgers are accessible only by network members with proper privileges and permissions. 

Through blockchain technology, digital transactions are securely and automatically documented in real-time without human involvement. This serves as a comprehensive transaction history that makes tracking investments more manageable than ever before. In recent years we've seen the rise of blockchain for storing essential data such as intellectual property (IP), patents, logos, healthcare databases, brand trademarks, and NFTs. One particularly popular use of this technology is in cryptocurrencies like Bitcoin, which have become widespread across user segments all over the world.

Blockchain technology will be used by Metaverse development companies in the future to securely store digital assets, payments and user data. This is due to the application of blockchain's unparalleled security capabilities that are expanding unreasonably fast.

What is blockchain security?

Blockchain is a technology that strives for maximum security. Even though total security is impossible, blockchain constantly works to strengthen its defences and becomes even more reliable with each passing day. Blockchain's safeguards are comprised of cybersecurity frameworks, auditing measures, assurance services, and other industry-standard best practices in order to reduce the possibility of malicious attacks or fraud. Moreover, financial companies take additional steps to protect Decentralized Finance (DeFi) from potential threats as well.

What makes blockchain such a reliable and secure technology?

The complex interplay of various characteristics like robust encryption, distributed ledger technology (DLT), consensus concept, and immutability make the technology secure.

  • Every new block within the blockchain receives a unique address.

  • Each block comprises a link to its previous block. This sequence or chain of data blocks lends the technology its name: blockchain.

  • Each link remains protected by data encryption and goes through data-validating transactions. The linkage formed with the previous block is unchangeable, hence immutable.

  • Every new block entering the existing blockchain gets confirmed by a particular set of validation nodes (consensus concept). This process mints a fresh token to match the data block.

Factors for security breaches

No financial system is 100% tamper-proof. Hence, blockchain is no exception. But blockchains are extremely difficult to hack or breach because of their specially-crafted design.

There are however two ways to take over the security of a blockchain and its established security mechanism. Both these techniques utilize a massive amount of computation and processing. 

  • The first attack technique is the 51 percent attack. Blockchains often rely on the majority for their network management principle. Thus, existing nodes can leverage this gap to double-spend cryptocurrency coins, insert fake blocks, or perform something illicit if someone controls more than half (hence the name 51 percent) of all verification nodes. But such an alteration or modification often requires massive computational resources.

  • Secondly, developers inadvertently leave bugs in systems that hackers exploit. If bugs allow for the insertion of incorrect data blocks, the blockchain becomes insecure. Thus, developers should remain cautious while preparing blockchain-based tools and solutions.

Other factors for security breaches are cryptojacking, cryptocurrency exchange attacks, and DDoS extortion. To learn more about such blockchain-based security threats, read this article.


While Blockchain helps maintain data privacy and establishes a decentralized data storage form, it has some flaws. But overall, with its immutable ledger and distributed architecture, blockchain technology is far more secure than traditional data storage models. Blockchain offers robust security measures to protect user information from being manipulated or tampered with by unauthorized parties. Therefore, businesses can benefit immensely from incorporating blockchain technology into their existing operational framework.

Looking for a Blockchain Penetration Test? Packetlabs can help! Contact our team today for a free, no-obligation quote and strengthen your security posture.

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