Joe Baguley, Vice President & CTO, EMEA – VMware

In business, the latest silver bullet is constantly just around the corner. One concept currently bathed in hype is blockchain. While many may have heard of it, those that can accurately explain what it is are likely less common. Put simply, it’s a database.

A solution in search of a problem

All this excitement for a database seems a little bizarre. We already have any number from multiple providers. The problem with these traditional databases is that it’s challenging from a legal perspective for anyone to say what’s in such and such a database right now is correct, honest, true and has not been tampered or messed with by anyone else.

With blockchain, once a piece of data is placed on it, it can’t be edited without everyone with access to that blockchain knowing. That’s because the data, or block, that’s been placed on it, is actually made up of every block that was placed before it, and it becomes part of every block that goes after it. It’s what’s known as immutable, and it’s one of the reasons blockchain is enjoying its moment in the sun.

Another reason is that blockchain is essentially unhackable, a major selling point in a world where it’s a case of when, not if, a business must deal with an attempted cyber-attack. It achieves this by being based on the concept of using distributed ledgers. That means there’s no pivotal point to attack, so no way of leveraging the connected nature of normal networks that cyber breaches rely on for scale.

So, it’s secure, it can’t be changed without everyone seeing it, and it’s transparent, so any one party to a blockchain can see where each piece of data was created, when, and by whom. It can do multiple things, but it feels like a solution in search of a problem. It doesn’t have one killer application that can change everything. That’s not to say the potential uses aren’t significant – from supply chain to finance, any sector which requires, and struggles, with trust and provenance of data should be an opportunity for blockchain-based technologies.

From diamonds to shipping

In the supply chain alone, there are a variety of initiatives trying to use blockchain to make the whole process more efficient and transparent, from De Beers creating a platform to register tamper-proof and permanent digital records for diamonds, to Walmart looking to improve food safety and product traceability with a number of different pilots, and a whole host of businesses aiming to improve the process of shipping.

From a legal perspective, blockchain is being used in what’s known as smart contracts. These are digital contracts that are not only unchangeable, but automatically enable contractual terms once conditions are met, whether it’s through the exchange of property (be it a house or car) or the releasing of funds (for instance, when a certain amount of work has been delivered).

However, it is in finance that the most prominent use blockchain can be found: cryptocurrency. While the volatility of the value of Bitcoin, cryptocurrency’s most famous example, might be putting some off from using it as a method of distributing or receiving payment, there are other, more fundamental issues with currencies based on distributed ledger technology. For starters, each transaction using a cryptocurrency needs to be queued, put into a block and then replicated to every other owner of that currency. For one like Bitcoin, that means having to replicate across a significant number of people, right across the world. In terms of time, you could be looking at anywhere between one and thirty hours.

The sheer amount of energy required to produce Bitcoin can also be an obstacle. Right now, the amount of electricity required to power the compute power to produce a Bitcoin is worth about the same as that Bitcoin – put more tangibly, at the end of May 2018, over 6 million US households or the whole of Switzerland could be powered by the amount of electricity used by Bitcoin.

Overcoming limitations to unlock true potential

As a society we are used to fast transactions – I tell you I have uploaded the data, or I pay you for my coffee with my credit card, and you know instantly whether that is the case. What good is a currency system if I must wait a day before I know if I’ve received payment, or if the data has been added to the system?

There’s another use, however, which stays true to the aspirations of blockchain, but which circumvents the challenges of having to connect with every other member of the chain – private, or internal, enterprise-grade blockchains. As businesses see their applications spread out, they’re going to need distributed database solutions at increasingly disparate points of the network or in their application infrastructure. In some instances, blockchain is going to be a perfect fit where a distributed, replicated, unchangeable database is required. For instance, collecting data from IoT sensors being used for AI consumption at the Edge and then pushing the results back to the middle. This will need to be carefully integrated into existing systems, while being able to manage a private blockchain is going to be critical, but it demonstrates the potential deployment of blockchain concepts in large-scale organisations.

Finding the right use for a system of trust

There’s no doubt that, when deployed properly, blockchain can help solve some of the challenges currently afflicting certain sectors today. That said, it’s not appropriate for all uses, or even all databases, and it does have limitations that are, at present, incompatible with the way business operates today. However, being immutable, transparent and unhackable, it can help build a system of trust between multiple independent parties – critical in improving the efficiencies and provenance of supply chains, for example. Yet it is within large-scale organisations that blockchains can have real impact. By supporting the storing and sharing of critical data as businesses’ own networks become decentralised, blockchain may have found the problem it can solve and help it make the jump from hype to standard behaviour.