Blockchain: The Potential for Supply Chains

June 5, 2020


A desk with scrabble letters spelling 'blockchain'

Any follower of banking and investing is probably familiar with the concept of cryptocurrency and, in particular, ‘bitcoin’. You may also have come across the phrase ‘blockchain’, but sometimes this is accompanied by little explanation. Blockchain is the technology behind cryptocurrency and due to this association it may, at first, seem difficult to understand.

Despite blockchain being commonly associated with cryptocurrency, there are many other applications for Blockchain technology. For example the current challenges facing the food and beverage supply chain industry, not only due to coronavirus, but consumer behaviour changes, may benefit from the technology. Indeed, while we may not have batted an eyelid ten years ago when buying a product from an unknown source, consumers are becoming increasingly interested in where products have come from, and the journey they have gone on from point of origin to final product. Buying trends have shown that particularly in younger generations, low price is now being considered after the conditions of the creation of the product, be that its sustainability, local origin or fairtrade rating. But how can you build trust in claims made on the provenance of goods?

The good news is that blockchain is not as complex as you may think, and this article aims to explain how blockchain can be particularly useful for effectively managing global supply chains and enhancing traceability and trust for consumers.

What is Blockchain?

To give a brief idea of what blockchain is let’s first look at deconstructing the word itself. In this context, the word ‘block’ refers to digital information whilst ‘chain’ refers to a public database in which the information is stored. Blocks on the blockchain can be divided specifically into three sections:

  1. The first section of a block stores information about transactions, such as the time, date and total cost.
  2. The second section of a block stores information about which parties are involved in the transaction using a digital signature comparable to a unique username rather than an individual’s actual name.
  3. The third section of a block stores information which makes a block distinguishable from other blocks, and this is done via a ‘hash’. This is a unique, cryptographic code that allows for each block to be told apart. For example, if you were to perform a transaction and then decide to perform a second transaction with the same participants, the information on both transactions would look nearly identical apart from the hashes which allow for distinction between the blocks.  

Blocks can store up to 1 MB of data, which means one block can house data from thousands of transactions depending on their respective size.

So we know about the blocks, but what about the ‘chain’ element?

How it works

For the blocks to be placed on the chain, four key steps must take place. Once this has happened, the clock is added to the blockchain, making it publicly available for anyone to see. This is an important advantage for product traceability and trust – the blocks all along a chain will therefore be visible to the consumer. Let’s look at the steps in more detail:

  1. A transaction takes place.
  2. The transaction must then be verified. When you think of an institution like Wikipedia for example, all new data entries have to be vetted by a higher authority, as you might expect. However, with blockchain all vetting of new data entries is left up to a decentralised network of computers as opposed to an individual or institution’s authority. When the transaction takes place, the computer network will process the data of the transaction to ensure that it happened as required, and only then confirms the transaction as complete.
  3. The transaction, now verified, then has to be stored in the block. The details of the transaction including the date, time and total cost, is stored along with the digital signature of each participant. Once in the block, it is likely that it has joined a lot of other transaction data of the same kind.
  4. Finally, the block must be assigned a hash. However, not only does the block get its own unique hash code, but also the hash of the most recent block added to the chain before it, to easily locate the block’s place in the chain.

Once all of these steps are complete, a block can be successfully added to the chain. That means it is now publicly available for anyone to view.


image of a bitcoin

It may seem rather peculiar that anyone can view the contents of a blockchain, so it is important to note that, despite not being entirely anonymous, personal information is never shared and is solely limited to the digital signature.

Once a block is added to the chain, its hash determines its place in the chain. Because of this, it is very difficult to edit the contents of a block once it is already in the chain. The hash codes themselves are created by an equation that turns digital information into numbers and letters. Because of this, if anything about the transaction were to be changed, the hash code and place in the chain would also change. This makes any breach of security very difficult, and in the event it did happen, it would be easy to spot. Any hacker wanting to tamper with the recorded transactions would need to keep going further up the chain to cover their tracks, as blocks cannot be deleted once they are on the chain.

Blockchain is also decentralised, which means its security is enhanced further. Each computer in the blockchain network can act as a ‘node’ and have a copy of the blockchain automatically sent to it and updated live. This means that if a hacker attempted to change a block, there are hundreds of thousands of other copies of the blockchain which could be used to identify discrepancy.


When blockchain was first invented, surprisingly all the way back in 2008 (and the cryptography behind blockchain was first proposed in an academic paper back in 1991), its sole utilisation was to serve as the public transaction ledger of cryptocurrencies. Now however, the application of blockchain technology to diverse situations is being widely investigated, which is why its potential use in commodities trading is especially pertinent.

The identity of the inventor of blockchain remains unknown except that it was conceptualised by either an individual or group of people referred to under the pseudonym ‘Satoshi Nakamoto’.

Blockchain has grown rapidly within the world of bitcoin and each succeeding year the bitcoin blockchain file size has reached new heights. Looking beyond bitcoin, blockchains have attained a 13.5% adoption rate within the financial sector according to research by Accenture in 2016, demonstrating its growing appeal. However, blockchain is still not as widely used as you might expect. In 2018, Gartner (the global research and advisory firm) found that as little as 1% of CIO’s confirmed any kind of blockchain use in their organisations.


adverts for blockchain

 Although it seems complex, the potential of blockchain as a record-keeping technology is significant. The general advantages of using blockchain can be summarised by five principal benefits:

  1. Improved accuracy – it takes away any human error in data verification
  2. Cost reduction – it eliminates the need for third-party intermediaries for verification of data
  3. decreased risk of hacking or tampering – it is decentralised
  4. increased privacy and security – a block’s hash makes it difficult to interfere with
  5. creating a more transparent process – all blocks on the chain are publicly visible

But how do these advantages apply to its application in the context of supply chains?

Whilst blockchain is principally associated with the bitcoin cryptocurrency, it can actually be used in any process involving transactions or exchanging data. Therefore, in terms of commodities, blockchain can potentially be used to track and record transactions of goods and services.

For commodities traders, blockchain could create a system in which each party connects directly with one another, and therefore bypass the use of intermediaries (such as banks or brokers) for identification and security and avoid the use of paper based documentation for verification. Undoubtedly, by verifying and recording transaction data on a permanent and reliable basis on a digital ledger and without the need of any intermediaries, would make trading more time and cost-efficient. This is because:

  • Cutting post-trade processing costs – This is one of the main advantages of blockchain use in commodity trading – it has been estimated that it can save up to 40% of costs across operations, accounting and IT.
  • Exchanges remain core – For wholesale trading, exchanges will remain core however blockchain can also help link wholesale markets to smaller, local and regional markets.
  • Derivatives trading – Blockchain is currently being developed for derivatives trading as a key target application. Blockchain has the potential to offer a common record of the transactions which will enable huge efficiency gains for trading regardless of the asset, whether a commodity derivate or not.
  • Tackling trade fraud – Money laundering is a critical issue within commodity trading. Blockchain’s use of a common record can help indicate any invoice irregularities, carousel transactions or unusual shipping routes to participants, thus helping to prevent potential money laundering.
  • Taking stock – Trade markets will be much more efficient with blockchain taking stock of storage levels and other key supply-and-demand data. Blockchain can aggregate data whilst entirely respecting and adhering to individual commercial confidentiality. Not only this, but it can also be used to perform auctions and digital tenders for physical bulk commodities.
  • Remaining secure – A big priority for most businesses is protection against cyberattacks. Blockchain can help mitigate cyberattack risk and safeguard international digital trading thanks to its use of cryptography and decentralised data storage.

Criticisms of blockchain

While blockchain has many admirers and has seen huge investment, it is not without its detractors. Many people accuse blockchain of being a technological solution looking for a problem, which may explain its slow uptake outside of its core bitcoin and cryptocurrency application.

More specifically, the technology has been criticised for the amount of computing power required to authenticate high volumes of transactions across a distributed network. And furthermore, its ability to create trust in transactions has also been questioned – while blockchain can accurately trace an organic product from a farm right up to the end consumer, how can it be used to tell if that farmer has been spraying chemicals on his crops or not?

Finally, the adoption of blockchain relies on the adoption of industry-wide standards for the technology, and widespread understanding, acceptance and use of the technology. While this is not the fault of the technology itself, for its application across a global industry such as commodities trading, this could be the most significant challenge it faces.

Looking Ahead

Blockchain was first proposed as a research project in 1991 which means it is now almost in its fourth decade. It has no doubt received much public criticism and scepticism in the past, much like any new technology. Businesses have continuously debated and speculated about what blockchain’s potential is and where it will be in the years ahead.

Now in its late twenties, blockchain is making a name for itself with many of its practical applications beginning to be implemented and explored in business, particularly with the rise of bitcoin. Although blockchain was first developed in 2008, there are currently very few live commercial applications of it – however this can of course change in the coming years. There is no longer the question of if blockchain will be used but rather, when and to what extent. Pilot projects using blockchain to support commodities trading are arising all over the globe and this will certainly increase as we, universally, move towards a paperless world – after all, you are reading this article on a laptop, mobile or tablet!

Here at Czarnikow, we are adopting a ‘blockchain-ready’ approach, so that we can quickly adopt blockchain technologies as they gain wider use across the market, while accepting that we are unlikely to be the single player which can implement this technology unilaterally.

To take an example, our involvement in sustainability through our continuous improvement programme, VIVE, has shown us the importance of traceability, so we have built our internal operational systems to be event-based and allow the tracking of deliveries across supply chains. So, while we can provide tracing for our clients within our own systems, we will be able to quickly adopt blockchain if it allows us to provide greater transparency outside of our own operations to our clients.

Furthermore, our in-house development capabilities will allow us to quickly adapt our systems to new technologies. The investment we have made in our employees across the organisation to support new technology development will ensure that any use of new technology is focussed entirely on helping provide value to our clients, and that we are able to cooperate with partners across all our stakeholder groups when it comes to adopting blockchain technology.

Author: Stuart Durrant, Head of Technology

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