How blockchain assists the improvement of healthcare?

Maciej Zieliński

13 Apr 2023
How blockchain assists the improvement of healthcare?


When you will find yourself in a hospital, the method at which your data is processed is the last thing you will be probably thinking about. However, it may be the key to your successful recovery. Why would the form of storing the data be so important and why does the blockchain seem to be the most optimal solution in this case? In this article we will dive into the topic of blockchain and healthcare, explain why is it important as well as show a real use case.

Why blockchain and healthcare?

The medical sciences are based on sheer facts and is fully dependent on them because their validity is a difference between the life and death of patients. The new medicine brought to the pharmacies, newly researched healing method or the project of a new tool wouldn’t be possible without a thorough analysis of hundreds of terabytes of data. We probably do not have to explain why is an accurate analysis of patients health and the information processed by the healthcare so necessary. The need to create and maintain massive databases with reliable and accessible information appears to maintain the proper flow of information between the experts and hospitals.

The key features of the usage of blockchain is the ability to protect the reliability of the data stored in its systems and to ease the flow of information between its systems. Thanks to that we reduce the human error margin and the risk of the loss or theft of data. This is why blockchain can prove to be revolutionary when it comes to aggregating data in the healthcare.

Blockchain in the medical e-documentation

In the last decades the need for the digitalization of medical documentation has increased significantly and has been requested by both doctors and patients around the world. Such a way of storage of data about the patients’ health, his medical referrals or the results of his testing makes them more accessible and eases the procedures that use them. After all the patient confronts many types of specialists on his road to health so any situation where  the medical history is inaccessible seems absurd.

Perhaps the main disadvantage of modern registries is the fact that they are scattered in between many facilities. The patients very often are forced to use many different medical services because of their life situations. Because of that, the data about their previous treatments is often lost or inaccessible. In Poland for example, many patients use both the private and the national healthcare which makes it difficult to control which of the EDM (electronic medical documentation system) systems would be used to allow the information to flow and so some doctors have difficulties with accessibility of data from his peers. Because the private medical facilities decide which EDM system they shall use independently, the communication between the different systems is usually lost. This translates into the lowered quality of decisions undertaken in reference to treatment and makes it difficult for the patient to access the documentation. Additionally when EDM is applied the data is often threatened by the audit, provenience and the loss of control.

Blockchain as a Solution

Solutions based on blockchain could potentially become a base for answering those issues. For example, MedRec system, tested by the Beth Israel Deaconess Medical Center uses the advantages shown by the blockchain to provide the users with confidentiality, integrity and an ability to easily verify data. Such a decentralised system of data gives its users an unchangeable medical documentation and allows for ease in accessing it in many situations.

An important trait of MedRec is the ability to let the patient be responsible for his own data. The system only holds a hash of the record of the medical documentation and informs the patient where the record should be held at. The hash allows for the record to be unchangeable and the users interface makes it sure that the medical documentation is consistent in between the medical facilities. This allows the record to be available for both the private and the national medical institutions as it is stored independently from them and is not limited to either.

A common trait between the blockchain based solutions like MedRec is the ability to exchange the medical data while there is a simultaneous confidentiality of the personal data. The first country which has discovered the potential behind this technology seems to be Estonia, where there was a first proposition of using the blockchain to maintain the EDM system.

Where shall we use the blockchain in the future?

In recent years, neurology of technological solutions had its fair deal of advancements. It has excited people around the world and left them hungering for more.  Its no surprise since the modern times strive towards less and less mechanical interaction with the infrastructure and the ability to control the facilities with the power of our own mind. Such neurological devices can interpret the patterns of brains activity and translate them into actual commands towards the external devices and interpret the psychological status of a person. However, in order to make such solutions work  we would need to digitalise the brain. Once again, blockchain can prove to become an indispensable tool to assist us in achieving that.

One of suggestions for such an implementation is storing the “thought files”, which would work like the compound elements of data of chains of personal thoughts which can be shared inside of a peer-to-peer system. This kind of blockchain thinking is proposed as a calculation system of processing the entering data with several functions that give the AI chance to integrate with the human brain.

Multicomponent verification which connects to the personal chain of thoughts as a blockchain implementation  can allow a safe cryptography of creation of joint numerical data for people. Such joint data reduce the number of silos of human data which also allows every human to keep their own private property and to share their own experience.  

Blockchain in Healthcare Use Case: Neurogress

One of the companies that confirmed their desire to use the blockchain technology to store the human brain activity data is Neurogress. Registered in Geneva and created in 2017, this company is keen on construction of neural control systems which will allow all of its users to control the machines, drones or AR/VR devices through the power of their mind. The Neuroregress system is focused on the usage of machine learning that is used in order to improve the ability to read the brains activity. Huge amounts of data about the neural activity is required to train the AI to use the system. The company defines the data with the usage of exabytes (1 exabyte = 1 billion gigabytes). Its no wonder the Neurogress will use blockchain as it allows the safety and privacy for data in large quantities.

Thanks to the ability to register the data of the user in decentralised blocks of chains is immune to manipulations and breaches. The system will allow the safety and confidentiality to its users because most of the suspicious activities are easily detectible. Simultaneously the usage of blockchain allows the Neurogress system to be open and accessible to its users.

Blockchain healthcare – the future of medical databases

The constant growth of medical sciences will bring much more data to process in the future. Quick processing of exchange between the facilities can become key in the improvement of the treatment process. Solutions which bring such a need will reduce the cost of procedures and the time needed to carry them out, they will reduce the usage of resources which are increasingly scarce. Additionally, the growing social awareness concerning the data and its protection will increase the need for the application of blockchain in the medical sector. As it offers an innovative look into the storage of data which assures its safety, reliability and quick exchange on the protocol level, it can become a solution that will let us both improve the existing methods and create newer, better ones.


To summarize, blockchain healthcare has the potential to transform the way patient data is stored and managed. Employing a secure, dependable, and decentralized approach for data aggregation, blockchain technology not only ensures patient privacy but also streamlines the exchange of information among hospitals and medical professionals. The MedRec system exemplifies this by empowering patients to control their data while preserving its confidentiality and consistency across various healthcare facilities. Moreover, applying blockchain technology to digitize brain data for neurological devices is another promising avenue being pursued by companies like Neurogress. In essence, blockchain healthcare offers promising solutions for data management and privacy concerns within the industry.

Want to know more about using the emerging technologies in medicine? Check out our article on AI in medice.

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Authorization and Identity: Chainlink Use Cases


14 Feb 2024
Authorization and Identity: Chainlink Use Cases

Chainlink stands at the forefront of enhancing security and compliance within smart contract-enabled blockchain networks. By enabling direct access to real-world data, Chainlink ensures that blockchain applications can operate with the same level of trust and verification as traditional systems. This integration is crucial for a wide range of applications, from financial services requiring Know Your Customer (KYC) and Anti-Money Laundering (AML) compliance to any form of digital agreement that needs to securely verify the identity of parties involved.


Chainlink is a decentralized oracle network that plays a critical role in bridging the gap between smart contracts on blockchain networks and real-world data. It enables smart contracts to securely interact with external data.

  • Decentralized Data Oracles. Chainlink's network of decentralized oracles ensures that data fed into smart contracts is accurate and tamper-proof, mitigating risks associated with relying on a single data source.
  • Smart Contract Connectivity to Real-World Data. It facilitates the seamless integration of external data sources, such as financial market data, weather information, and much more, enabling smart contracts to execute based on inputs from the real world.
  • Chainlink VRF (Verifiable Random Function). This feature provides a secure and provably fair source of randomness for blockchain applications, crucial for gaming, NFTs, and any application requiring random number generation.

READ: "What is Chainlink"

When it comes to authorization and identity verification, Chainlink's role becomes even more crucial. By connecting smart contracts with external data sources, such as governmental identity databases or digital identity verification services, Chainlink enables the creation of blockchain applications that require verified human identities. This capability is essential for applications that must adhere to regulatory standards or for those seeking to mitigate the risk of fraud.

Moreover, Chainlink's decentralized nature ensures that the process of identity verification is not only secure but also resistant to manipulation. By leveraging multiple independent oracles to fetch and validate data before it's provided to a smart contract, Chainlink ensures a level of reliability and trustworthiness that centralized data sources cannot match. This decentralized approach to authorization and identity verification opens up new possibilities for blockchain applications, making them more accessible, compliant, and secure for users around the globe.

The integration of Chainlink's decentralized oracle network into the domain of authorization and identity verification heralds a new era of security, efficiency, and compliance for blockchain applications. By leveraging real-world data and external verification services, Chainlink enables smart contracts to perform functions that were previously unthinkable in the blockchain space. Here, we explore several key use cases where Chainlink's technology significantly impacts authorization and identity verification processes.


In the digital age, e-signatures have become the norm for legally binding agreements, eliminating the need for physical presence or paper-based documents. Chainlink oracles facilitate the integration of blockchain applications with leading e-signature providers like DocuSign. This integration ensures that e-signatures can be verified and recorded on the blockchain, providing immutable evidence of agreement and authorization. Furthermore, by enabling smart contracts to interact with e-signature solutions, Chainlink opens the door to automated contract execution based on the completion of digitally signed agreements, thereby streamlining business processes and reducing the time and cost associated with manual verification.

Biometrics for Smart Contract Authorization

Unstoppable Domains uses Chainlink oracles to enable users to tie their off-chain Twitter identity to their on-chain Ethereum domain name (Source:

Biometric verification offers a high level of security and convenience for identity verification, leveraging unique physical characteristics such as fingerprints or retinal patterns. Chainlink enables smart contracts to securely access and verify biometric data, ensuring that only authorized individuals can trigger certain actions on the blockchain. This use case is particularly relevant for access control systems, secure transactions, and identity verification processes that require a high degree of trust and security. By connecting smart contracts with biometric databases and verification services through Chainlink oracles, blockchain applications can achieve a new level of security and fraud prevention.

Credential Verification

Credential verification is crucial in numerous applications, from financial transactions requiring proof of funds to access systems demanding specific security clearances. Chainlink oracles play a pivotal role by securely relaying credential verifications from external systems to the blockchain. This capability allows smart contracts to automatically verify users' credentials in real-time, facilitating seamless transactions and interactions that require verified identity or authorization credentials. For example, a decentralized finance (DeFi) platform can use Chainlink to verify a user's creditworthiness or asset ownership before allowing them to participate in lending or borrowing services.

Social Media Identity and Domain Names

The integration of social media identities with blockchain applications enhances user experience by providing more intuitive and human-readable identifiers, such as domain names or social media handles. Chainlink oracles facilitate this by securely linking off-chain social media identities to on-chain addresses or domain names. This use case not only improves the usability of blockchain applications but also adds an extra layer of verification, as users can easily confirm the authenticity of the parties they are interacting with.

Intellectual Property Management

Chainlink's decentralized oracle network enables smart contracts to interact with external IP databases for verifying ownership and facilitating transactions related to intellectual property (IP). This application is particularly useful for copyright and trademark management, patent licensing, and royalty distribution. By automating IP verification and transactions through Chainlink, creators and owners can more efficiently manage their rights and receive payments, while users gain access to verified IP assets.

Contribution Bounties in Open Source Projects

Open-source projects can leverage Chainlink oracles to automate the verification of contributions and the distribution of bounties. By connecting smart contracts with public code repositories like GitHub, Chainlink allows projects to automatically track contributions, verify the fulfillment of predefined conditions, and release payments to contributors. This application streamlines the contribution process, incentivizes open-source development, and ensures that contributors are fairly compensated for their work.


Chainlink significantly impacts blockchain, enhancing security and compliance, especially in authorization and identity. It bridges real-world data with blockchain, ensuring trust and wider adoption. As blockchain evolves, Chainlink's innovations promise a more inclusive digital future. Its key role in securing and streamlining blockchain applications marks a crucial step forward for digital interactions. Chainlink is pivotal for a secure, compliant, and efficient blockchain ecosystem, shaping the future of digital transactions.

If you are interested in utilizing Chainlink or other blockchain-based solutions for your project, please reach out to

Chainlink vs. Avalanche: Exploring the Blockchain Frontier


13 Feb 2024
Chainlink vs. Avalanche: Exploring the Blockchain Frontier

Chainlink emerges as the bridge between the real world and the blockchain. On the other side, Avalanche flashes through the blockchain space with a lightning speed platform that promises scalability without compromise. Both are revolutionaries in their own right, yet their paths are markedly different. Chainlink's quest to secure the integrity of off-chain data in a decentralized manner contrasts with Avalanche's mission to redefine blockchain's scalability and usability. But what happens when these paths intersect?


Chainlink is a decentralized oracle network that plays a critical role in bridging the gap between smart contracts on blockchain networks and real-world data. It enables smart contracts to securely interact with external data.

  • Decentralized Data Oracles. Chainlink's network of decentralized oracles ensures that data fed into smart contracts is accurate and tamper-proof, mitigating risks associated with relying on a single data source.
  • Smart Contract Connectivity to Real-World Data. It facilitates the seamless integration of external data sources, such as financial market data, weather information, and much more, enabling smart contracts to execute based on inputs from the real world.
  • Chainlink VRF (Verifiable Random Function). This feature provides a secure and provably fair source of randomness for blockchain applications, crucial for gaming, NFTs, and any application requiring random number generation.

READ: "What is Chainlink"

What is Avalanche?


Avalanche is a highly scalable blockchain platform designed for decentralized applications (dApps) and custom blockchain networks. It distinguishes itself with its emphasis on scalability, speed, and eco-friendliness.

Key Features of Avalanche

  • High Throughput and Low Latency. Avalanche boasts a high transaction output rate with low latency, making it an ideal platform for scaling dApps and financial solutions.
  • Eco-friendly Consensus Mechanism. Unlike proof-of-work (PoW) systems that require significant energy expenditure, Avalanche uses a novel consensus mechanism that is energy-efficient, contributing to a more sustainable blockchain ecosystem.
  • Scalability and Interoperability. The platform supports the creation of multiple custom blockchains that can interoperate seamlessly, facilitating a diverse and scalable ecosystem of applications.

READ: "Avalanche’s Investment in Real-World Assets Tokenization"

As blockchain technology continues to evolve, understanding the nuances between different platforms and solutions like Chainlink and Avalanche becomes increasingly important. Here's how these two blockchain giants stack up against each other:

Underlying Technologies and Architectures:

  • Avalanche utilizes a unique consensus protocol known as Avalanche consensus, combining the benefits of classical consensus algorithms with the decentralized nature of blockchains. This protocol allows for high throughput, quick finality, and energy efficiency.
  • Chainlink, on the other hand, is not a blockchain but a decentralized network of nodes that provide data to blockchain networks. It uses a network of independent node operators who are incentivized to provide accurate data to smart contracts.

Consensus Mechanisms:

  • Avalanche employs a Proof of Stake (PoS) model designed to be lightweight and energy-efficient. Validators participate in reaching consensus by staking AVAX tokens, contributing to the network's security and governance.
  • Chainlink does not use a consensus mechanism in the same way a blockchain network like Avalanche does. Instead, it relies on a decentralized network of oracles to validate and relay data, ensuring the integrity of information provided to smart contracts.

Chainlink is best suited for applications that require secure, reliable, and tamper-proof data inputs from the real world. This includes:

Avalanche is optimized for a wide range of blockchain applications needing high throughput, quick finality, and scalable infrastructure, such as:

  • Scalable DeFi platforms and DEXes.
  • Enterprise blockchain solutions.
  • Custom blockchain networks (subnets).

Examples of Real-World Applications and Partnerships:

  • Chainlink has partnered with Google Cloud for cloud data integration and with numerous DeFi platforms like Synthetix and Aave for price feeds and randomness.
  • Avalanche has formed partnerships with Deloitte for enhancing security and speed in disaster relief platforms and with top DeFi protocols to build on its highly scalable network.

Ecosystem and Community

Development Community and Ecosystem Support:

  • Both Chainlink and Avalanche boast robust and active communities. Chainlink's community is highly engaged in developing external adapters and securing data for smart contracts. Avalanche's community focuses on developing dApps and custom blockchain networks.

Tools, Resources, and Support:

  • Chainlink offers extensive documentation, a vibrant developer community, and grants for projects integrating Chainlink's technology.
  • Avalanche provides developers with comprehensive resources, including tutorials, technical documentation, and funding for ecosystem growth through the Avalanche Foundation.

Tokenomics and Market Performance

  • LINK (Chainlink's token) is used to pay for services within the Chainlink network, including data requests to oracles. It incentivizes node operators to provide accurate data.
  • AVAX (Avalanche's token) serves as the native currency within the Avalanche network, used for transaction fees, staking, and governance.
  • In terms of market performance, both LINK and AVAX have shown significant growth and adoption, reflecting their utility and the demand for their respective network's services. However, their performance can vary based on overall market trends, technological advancements, and adoption rates in their specific use cases.


Potential for Integration

The potential for integration between Chainlink oracles and Avalanche’s blockchain platform is substantial. Chainlink’s decentralized oracles can provide Avalanche-based applications with secure and reliable real-world data, enhancing the functionality and scope of Avalanche’s already fast and scalable blockchain. This integration can benefit a wide range of applications, from DeFi and insurance to gaming and prediction markets, by providing them with the essential data needed to operate effectively and transparently.


Chainlink and Avalanche, while serving distinct purposes within the blockchain ecosystem, demonstrate a powerful synergy when combined. Chainlink’s ability to provide secure, reliable, and decentralized data complements Avalanche’s high-throughput, scalable blockchain platform, enabling developers to build more complex, useful, and transparent applications.

READ ALSO: "Chainlink vs Polkadot"

If you are interested in utilizing Chainlink or other blockchain-based solutions for your project, please reach out to