Hi, I’m Sarah, and I’ve been working in the tech industry for several years now. During my time in this field, I’ve seen firsthand the incredible potential of the Internet of Things (IoT) to revolutionize the way we live and work. However, I’ve also seen the many security challenges that come with connecting so many devices to the internet. That’s why I’m excited to talk about the role of blockchain in securing IoT devices. As a technical writer, I’ve had the opportunity to research and write about this topic extensively, and I believe that blockchain has the potential to be a game-changer when it comes to IoT security. In this article, I’ll explore what blockchain is, how it can be used to secure IoT devices, and some of the challenges that still need to be addressed. So, let’s dive in!


The age of the Internet of Things (IoT) has brought with it many exciting opportunities, but also a range of new security risks. As IoT devices become increasingly connected, the need for secure systems and protocols has never been greater.

In this article, we explore the role that blockchain technology can play in securing IoT devices.

Definition of Blockchain

Blockchain is a distributed public ledger technology used to secure digital assets and provide immutable, traceable, and auditable record-keeping. It is a chain of cryptographic blocks containing information about transactions or any other data of digital value connected using decentralized nodes. Instead of a central authority tracking ownership of records, blockchain distinguishes itself with its decentralized approach; each node works to validate every transaction and eventually reaches consensus on the state of the system. This means that data stored on a blockchain can never be erased or manipulated making it extremely secure and reliable.

Blockchain is arguably best-known in the context of Bitcoin and other cryptocurrencies, but has much broader applicability across many industries such as healthcare, finance, state and local government, insurance, operating resources in the cloud and many more. Blockchain also plays an important role in protecting IoT devices from potential security threats by providing an additional layer of security beyond traditional network defenses.

With the help of blockchain technology it is possible to add trustworthiness to IoT devices without relying solely on authentication such as usernames and passwords which are often unreliable for device authentication since any credentials entered must be shared with multiple parties. Through blockchain we can also log every step along with date/time stamps for real-time monitoring for changes in each device’s health status over time. This provides great data transparency which helps prevent fraudulent activities from occurring across all endpoints connected to the network ensuring the integrity of data stored on all devices connected to the network.

Definition of IoT

The Internet of Things (IoT) is the inter-networking of physical devices, vehicles, buildings and other items embedded with electronics, software, sensors, actuators and network connectivity which enable these objects to collect and exchange data. Generally speaking, IoT can refer to just about anything that is connected to the internet and is able to collect or send data. It’s estimated that the total number of connected devices has reached more than 27 billion worldwide.

The use of IoT technology offers numerous advantages for both consumers and businesses alike. It provides businesses with detailed data on their product lifecycles as well as customer usage patterns; it helps consumers save time by having devices perform on their behalf; and it can improve safety by providing beneficial information on potentially dangerous activities or objects.

However, with so many internet-connected devices in use it creates an increased risk for cyberattack due to its sheer amount of electronic entryways available for malicious infiltrators. The increasing threat of cyberattacks means that those who manage or use IoT devices must possess effective cybersecurity measures in place in order to ensure their device remains secure from potential attack.

Blockchain presents a unique opportunity for mitigating risk associated with IoT security vulnerabilities due to its immutable ledger design which allows for consistent records tracking across all decentralized nodes created by a consensus process. Given this capability, blockchain technology offers numerous benefits specifically designed for securing IoT networks including but not limited to:

  • Data encryption
  • Identity authentication
  • Transaction validation
  • Smart contracts enforcement

Benefits of Blockchain for IoT

The use of Blockchain technology provides a secure, reliable and immutable platform to store data collected through IoT devices. Blockchain’s distributed ledger technology prevents data tampering and ensures that the stored data remains secure and unaltered. As well as implementing encryption, Blockchain also provides secure authentication to ensure that only the intended parties can access data on the network.

Let’s dive into the benefits of Blockchain for IoT:

Improved Security

The use of blockchain technology can drastically improve the security of Internet of Things (IoT) devices and networks. By using blockchain, IoT systems are protected with a higher degree of authentication and access control compared to traditional methods such as passwords and encryption keys. IoT systems secured by blockchain can also be constantly monitored and adjusted to ensure that any unauthorized access attempts or malicious activity is detected quickly.

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Blockchain applications for IoT provide robust mechanisms for establishing trust between users and machines, allow data integrity to be verified, provide accountability through services such as smart contracts and distributed ledgers, offer end-to-end encryption of data communications, establish an immutable record of events for auditing purposes, and facilitate secure data storage by decentralizing it. All these measures help protect against potential security breaches or cyber attack attempts.

In addition to improved security, blockchain technology can also contribute to better performance in terms of scalability, availability and cost reduction. With blockchains decentralized nature, it can help create more reliable networks that are resilient against hacking attacks or natural disasters due to its distributed nature which allows the network to be adapted more rapidly in case certain parts become unavailable. Moreover its faster transactions times help cut costs related to managing transactions within the network enabling faster responsiveness when adapting communication changes with numerous devices, eliminating delays associated with centralized servers or databases.

Enhanced Data Integrity

Blockchain can play a crucial role in ensuring data integrity in IoT devices. One of the common issues faced by IoT devices is data tampering and corruption. As these devices communicate, share and transport data among multiple entities with complex data communication pathways, they are subjected to malicious attacks or errors. Such attack can lead to compromised data, resulting in inaccurate decisions or actions being taken by the device controllers, which could be disastrous in certain scenarios.

Using blockchain technology and its concept of immutable ledger can help improve the integrity of transferred information. To keep the blockchain secure and tamperproof, it usually applies sophisticated cryptographic techniques to protect all its transactions from unauthorized access or modification. This way it ensures that all transmitted information remains private while also eliminating any potential modifications made by attackers.

In other words, leveraging blockchain for IoT can help ensure accurate delivery of data from one source to another remote device without fear of manipulation or corruption due to malicious intent or human errors. The combined use of Blockchain and IoT technologies have the potential to usher in innovative business models that can reduce transaction costs associated with various commercial exchanges as well as enhance trustworthiness among involved parties across different industries.

Improved Data Accessibility

Blockchain technology enables transparent and secure access to data across multiple devices and locations, while also providing users with the ability to track its journey. With blockchain’s data-protection capabilities, it has the potential to maintain accurate and consistent records of individual IoT devices, regardless of its physical location.

By connecting different devices and applications through a distributed ledger technology (DLT), blockchain can serve as a single source of truth for IoT systems by providing a shared record that can be accessed by all participants. This results in increased efficiency since all participants would have seamless access to the same data without having to go through multiple channels or sources.

Improved data accessibility resulting from blockchain will help increase trust among all participants involved in any transaction or service based on communication among interconnected IoT devices.

Challenges of Blockchain for IoT

As we move towards an increasingly connected world, we need stronger security protocols and methods than ever before. Blockchain technology has often been suggested as a solution for securing IoT devices. However, the complex technology comes with its own set of challenges.

In this article, we will discuss the challenges of blockchain for IoT devices and explore ways to overcome them:


The scalability of blockchain plays a key role in leveraging its capabilities for the Internet of Things (IoT). The main challenge lies in the inability of current blockchains to scale according to growing IoT needs. Data from millions of connected devices’ activities will require high scalability that many current blockchain networks lack. This problem is especially pertinent for public blockchains since all involved nodes participate in consensus, ultimately limiting transaction throughput and causing high latency.

A potential solution is a sharding approach that divides a single chain into several smaller chains, each focusing on only part of the data and being independently validatable according to all chain members. Although sharding still poses security risks, it could enable higher transaction throughput while maintaining decentralization and network consensus. Separating data into shards could help optimize the cost-benefit ratio by employing different security protocols to each shard’s data depending on its value or sensitivity, thus ensuring a balanced approach between scalability and security within an IoT system.

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Blockchain is an expensive protocol to maintain. Companies need dedicated data centers, hardware and software to implement the system. For example, real-time computing requires large amount of computational capabilities such as RAM size and speed.

As the nodes increase in number, the cost of using blockchain increases as more computational power is needed to verify transactions across each node in the network. In order for IoT devices to use blockchain, their combination with AI algorithms is necessary in order to maintain cost efficiency. This involves many challenges including:

  • the integration of AI with blockchain technology
  • bandwidth constraints when transmitting data over the Internet
  • energy consumption
  • scalability

These are key nodes that need to be addressed when creating smart contracts that will execute agreements between remote systems in a secure manner over long periods of time.

Energy Consumption

The use of blockchain in securing IoT systems impacts the energy usage. Blockchain can potentially be useful for distributed ledger management and authentication or authorization functions, but the consensus mechanisms that are necessary for trust have a heavy energy consumption footprint. Even when utilizing less resource-intensive consensus models like Proof or Stake (PoS) consensus, blockchain networks still require a significantly greater amount of energy than other methods like IPsec or TLS due to the need for miners to supply processing power to reach consensus and thus guarantee true decentralization.

Benchmarking against traditional security mechanisms is also necessary – in terms of cost, complexity and suitability to environment, while still providing an appropriate level of service. Factors such as scalability become even more important when considering the expected growth in the number of connected devices in the near future – 5.8 billion by 2022 according to estimates.

In addition, one of the key features concerning blockchain-based network is privacy, given its capacity as a system to store confidential information shared with other peers on a distributed ledger system. That implies needing privacy protection if data becomes publicly accessible through data breaches or mining attacks which can compromise users’ confidentiality and security by allowing attackers access to user information such as identity, financial history or online behaviors. It is not only an issue throughout blockchain-based structures but relies upon properly implementing these tools into integrated architectures; this requires ensuring that systems have adequate robustnesses and compliant verification requirements during design process testing across different protocols including secured high-level self-managed software components as well as standard protocols controlling information flows between different components within a distributed application infrastructure built upon it.

Use Cases of Blockchain for IoT

As the Internet of Things (IoT) technology grows, there is an increasing need for security and trust across its many devices. Blockchain technology can be an effective way to secure these devices, as it is a secure, decentralized and distributed network.

In this section we will examine how Blockchain technology can be used to secure IoT devices, and the potential use cases for such technology.

Smart Homes

Smart homes are increasingly being established as our daily lives are becoming even more interconnected and digital. These smart devices require a secure and reliable operating system to ensure their safe functioning, and blockchain could be a viable solution. Blockchain’s decentralized nature provides data security, privacy protection, and a secure environment for the IoT devices of a smart home.

Here are some use cases of blockchain in securing IoT devices in smart homes:

  • Authentication: IoT-enabled devices must exchange digital identities with each other if they must interact properly. Blockchain can be used to securely store and manage these identities, ensuring that only the proper identities have access to the network. This would prevent malicious outsiders from accessing the network, as well as helping protect against attacks such as identity spoofing.
  • Data Protection: The data generated by IoT-enabled systems is extremely sensitive in nature and should stay within the intended system only. By leveraging blockchain technology, we can ensure that no one else has access to this data unless permitted by its owner. The encryption provided by blockchain will also guarantee that this information is not accessible even if someone does gain access to the network.
  • Secure Payment Processing: Blockchain technology can also be used for secure payment processing for transactions conducted within smart homes via IoT-enabled devices, such as appliances paying for energy consumption or robots trading digital currency among each other. Using blockchain would provide an extra layer of security and trust between parties in these transactions while making sure they proceed smoothly and securely without third-party intervention or manipulation.

Supply Chain Management

Supply chain management (SCM) is a critical application for Blockchain technology and IoT devices. In this use-case, blockchain helps track the items in the supply chain in real-time. It also enables everyone in the supply chain to monitor, record, verify and share data securely.

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Blockchain also helps optimize product flow while reducing air cargo costs and decreasing inventory lead times through improved asset tracking. Furthermore, blockchain-based SCM solutions can provide better visibility into logistics operations. This allows manufacturers and retailers to analyze their performance metrics more quickly than ever before by tracking their products from delivery ‘door to door’ across the entire supply chain.

Another benefit of using blockchain for SCM is that it offers secure storage for supply chain data. For instance, shippers can store delivery information on an immutable ledger hosted by a permissioned network rather than centralizing this data on a single server or database. This ensures that only authorized participants are able to access sensitive data, which provides greater security and privacy throughout the entire SCM process.

Autonomous Vehicles

Autonomous vehicles, or self-driving cars, are revolutionizing the way we think about transportation. With many safety considerations to take into account, blockchain technology offers a secure platform for managing and transmitting data from or to these vehicles. With improvements in sensor technology and other innovations, these vehicles can gain in accuracy and security.

The distributed ledger of a blockchain system ensures that data isn’t changed or corrupted midstream, enabling secure transmission of information that is valuable to autonomous vehicle operators. Not only could blockchains power autonomous automobiles but they can also be used to manage parking systems, highway rules enforcement and toll booths.

By storing data on every car that has crossed the toll booth along its route, the receiver is able to track precisely when those cars have passed through and where they went after leaving the toll road. As consequence the receiver will receive an exact assessment of the bill each car owner should be charged according to amount of use made with respective payments being performed via digital payment systems enabled by blockchain technologies.

By using smart contracts in such applications, nodes can trust each other without using any third-party validation mechanism as this would be done automatically by the blockchain system confirming automatically that a certain contract has been fulfilled according rules encoded within it beforehand between protagonists involving this process. In this way security for all players in autonomous transport is improved leading higher trust levels between nodes involved providing enhanced reliability for all players benefiting all actors related with those use cases around transport ecosystem deriving from augmented security features afforded by utilizing blockchain based technologies within their environment.


In conclusion, there can be no doubt that Blockchain technology has an important role to play in the security of IoT devices. By reducing the risk of hacker attack, and encrypting data that can be used to control devices, Blockchain can make IoT devices safer and more secure.

However, it is important to note that while Blockchain may present a viable solution to some of the risks posed by IoT, new challenges may emerge with further implementation and development. Therefore, further research is needed in order to ensure that all potential risks are mitigated.

Frequently Asked Questions

Q: What is the role of blockchain in securing IoT devices?

A: Blockchain technology can provide several benefits, including secure data transmission, authentication, and decentralized systems that prevent unauthorized access to IoT devices.

Q: How does blockchain work in securing IoT devices?

A: Blockchain creates a distributed ledger that records data transactions in a tamper-proof and immutable manner. This means that the data transmitted between IoT devices is encoded and encrypted to ensure that it remains secure.

Q: Can blockchain prevent cyber attacks on IoT devices?

A: Blockchain can provide a secure platform to ensure the integrity of the data transmitted between IoT devices, but it is not a foolproof solution. A comprehensive security strategy that includes encryption, authentication, and network security measures is still necessary.

Q: What are the benefits of using blockchain in securing IoT devices?

A: Blockchain provides a secure platform that uses encryption and a distributed ledger to safeguard data transmitted between IoT devices. This can prevent unauthorized access and tampering of data, ensuring the integrity and confidentiality of sensitive data.

Q: Is blockchain technology widely used to secure IoT devices?

A: While blockchain technology is gaining popularity as a solution for securing IoT devices, its implementation is still in the early stages. However, industry experts predict that blockchain will become an essential part of secure IoT solutions in the near future.

Q: Can blockchain help in scaling IoT devices?

A: Yes, blockchain technology can be used to create decentralized systems that distribute the processing power required to scale IoT devices. Decentralized systems can also increase the reliability and resilience of IoT networks, reducing the risk of downtime and service interruption.