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Marek Cyran, a senior lead scientist with Booz Allen Hamilton, notes that many of the assumptions about blockchain technology and its abilities are misleading. Below, Cyran outlines the top 7 misconceptions about blockchain technology and offers expertise for those looking to understand the technology.
According to the “Stanford Medicine 2017 Health Trends Report: Harnessing the Power of Data in Health,” it is estimated that the amount of medical data grows by 48 percent each year. With all of this data comes opportunity, but do healthcare systems know how to share data in the most efficient way?
Many organizations within the healthcare sector are beginning to understand the potential applications of blockchain including Clinical Data Sharing, Research Data Exchange, Population Surveillance, and Claims Adjudication. The common
Implementing blockchain technology does NOT mean building a database. Instead, transactions are essentially written in a distributed, immutable transaction ledger. Once data (in the form of a transaction) has been persisted, it can never be
changed. Furthermore, modern blockchain implementations are much more than simply transactions stores. Through the use of Smart Contracts, users have the ability to create and execute programs on the blockchain that other users can interact with.
Blockchain transactions are NOT encrypted. Most people consider blockchain technology to be a way to transfer data securely, but without the right encryption layers, that is not an accurate assumption. With blockchain technology, transactions are cryptographically signed to ensure the sender of the transaction is who they claim to be, but this signature does not obfuscate the transaction data. In the blockchain ecosystem, there is currently a significant amount of interest in a sophisticated technique called
built-in limitations on how much transaction expense can be associated with a given block. There are software solutions that are far better equipped to handle data storage that can be run alongside a blockchain, most notably Interplanetary Filesystem.
Mining, also called Proof of Work (PoW), is NOT the only algorithm that can be used to maintain consensus in a blockchain. In a blockchain, each node retains a full copy of the transaction ledger. As transactions come into the blockchain, a consensus algorithm is used to determine the next batch of valid transactions (block) to be incorporated into the ledger. Most public blockchains use an algorithm called Proof of Work, where nodes in the blockchain are incentivized to validate transactions by earning a reward for being the first to solve a cryptographic puzzle used to determine the next valid block. There are other algorithms, including Proof of Stake (PoS) and Proof of Authority (PoA), that are more frequently used in private blockchains and support far higher transaction throughputs.
Blockchain-specific development is ONLY a small part of developing blockchain solutions. Developing and implementing blockchain solutions requires the development of a platform that will facilitate custom lookups, provide storage for public/private key artifacts, incorporate external business logic, and provide some mechanism to manage Smart Contracts being deployed into the blockchain.
A blockchain development team should have a well-rounded full stack development skillset. When implementing production level blockchain solutions, the blockchain-specific programming is typically only 10 percent of the total amount of code written. As a result, the development team must possess a well-rounded, general programming skillset coupled with deep understanding of how to write software that interacts with a blockchain network.
This article was written in collaboration with the FDA Office of Translational Sciences (OTS) and Discover Group.
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