Food Supply Chain and Provenance

On 4 June the Secretary of State announced that Professor Chris Elliott, Director of the Global Institute for Food Security at Queen’s University Belfast, was to lead an independent review into the integrity and assurance of food supply networks.

The aim of the review will be to “advise the Secretary of State for the Environment, Food and Rural Affairs and the Secretary of State for Health and also industry on issues which impact upon consumer confidence in the authenticity of food products, including any systemic failures in food supply networks and systems of oversight with implications for food safety and public health; and to make recommendations”.

The public, and all those involved in food supply (and the way that food supply is regulated) are invited to give us their views. Through this call for evidence, we are keen to hear about issues including those which affect consumer confidence.

Thank you for this opportunity to provide input into this review on the food supply chain. As an individual and parent, I am concerned by the quality of food, the quality of ingredients, their origin, and the production processes. For allergies, and in general for health reasons, the correct, timely, and accurate labelling of food products is critically important. Furthermore,  locations where produces are grown, CO2 footprint, and ethical considerations are also matters of increasing interest. Price is also on our mind during weekly shopping, and the last thing we would want is a regulatory burden that would either reduce the variety of foods available to us, or make food unaffordable.

I am writing this contribution in my capacity of Professor of Computer Science, at the University of Southampton, and co-chair of the recent Provenance Working Group at the World Wide Web consortium. As a computer scientist, I believe that the solution to this challenging problem has to rely on technology, and such a technology is now readily available in standardized form. On the Web, we use the term provenance to refer to a record that describes the people, institutions, entities, and activities involved in producing, influencing, or delivering a piece of data or a thing. Such a concept is equally applicable to food.

The problem of food traceability is analogous to the problem of provenance of data on the Web: multiple organisations are typically involved in the creation of food or Web data, regulatory authorities/governments have to audit the supply chain of food and information on the Web, third parties (such as consumer groups or review sites) can comment on and analyse food and information items, consumers wish to access information about them, rate it, and share it through social media.

The solution to the food supply chain problem includes making provenance of food explicitly available, in a computer processable format, over the Web infrastructure, including all details of its ingredients, production, and delivery, so that it can be contributed to, and inspected, by all stakeholders: farmers, industry, regulators, consumer groups, and end consumers. Ubiquitous availability of provenance will allow novel, useful services to be developed, providing detailed analysis, reviews, or recommendations. All this processable evidence will also help identify suspicious steps in the food production chain, or gaps in the recorded information, which can then trigger further inspection. Ultimately such a provenance-based online environment will promote transparency and accountability and will allow consumer confidence to be restored.

I am expanding on these thoughts below, by answering some of the questions, and would be delighted to discuss them, in person, with the team undertaking the review.

1. What measures need to be taken by the UK food industry and government to increase consumers trust in the integrity of the food supply systems?

Full provenance of food, including the organization, people, food products, locations, processes, and transportation needs to be systematically made available online. Provenance must be in a computer processable, standardized, and open  format so that it can be browsed, mined, analyzed, and audited by all stakeholders of the food industry, hereby offering transparency for the whole industry.   It is also crucial to recognize that no single authoritative source of provenance may exist for a given food product, but independent parties (e.g. regulatory authorities, organizations in the supply chain, consumers, consumer groups) should be able to contribute to such provenance evidence.

With this information infrastructure in place, scanning the barcode of a product on a supermarket shelf, or clicking a button, should give the consumer real-time, up-to-date information about its origin, quality and constituents.

Consumers may not be interested in all the tiny details of a product’s provenance. We anticipate that novel services will emerge that describe products according to user’s preferences, e.g. allergens may be far more important for some than locality of products. Consumers will decide which “food recommender service” they will trust.

The regulatory framework should identify (and to some extent already does) the minimum provenance expected to be found.  Openness, transparency, data journalists, and the many eyes of the crowd will help identify missing or inconsistent provenance.

3. How can government, food businesses and regulators better identify new and emerging forms of food fraud?

Online provenance can become an incredible source of information for detecting inconsistent food labels, suspicious patterns of processing and transporting, lack of inspection, etc. Furthermore, given that every piece of provenance evidence is a claim that should be attributable to some organization or individual,  it allows responsibility to be assigned.  This is particular useful to identify who is responsible for a fraudulent situation.

In this context, provenance evidence becomes the foundation for establishing trust in food products. Provenance evidence itself should be non forgeable. Mechanisms such as digital signatures combined with provenance of provenance allows for provenance evidence to be attributed unambiguously.

5. Do consumers fully understand the way industry describes the composition and quality of the products on sale?

The provenance evidence advocated in this document, can and should be as technical as required for the purpose of auditing, compliance checking, etc.  Since it should be extensive and detailed, it could not possibly be printed on a product packaging, but it should be available online.

The information made available to consumers (including that on packaging) can be seen as a summary of the full provenance of a product, presented to consumers in a friendly and practical manner. Such consumer targeted information should also be regarded as provenance evidence, also available in machine processable format, which can be validated against detailed provenance evidence.

11. How can large corporations relying on complex supply chains improve both information and evidence as to the traceability of food?

By leveraging a standard vocabulary for provenance (and a food-industry specific terminology for all entities, agents and activities), large corporations, their suppliers and consumers, and their auditors, can create a Web of provenance evidence for food, which can be navigated by all stakeholders of the food industry.

12. Should there be legislative requirements for tamper proof labelling, and/or to advise competent authorities of mislabelling if it is discovered in the supply chain?

Cryptographic signature is a mechanism by which a label (or more generally any digital document) can be “signed” by a  party, demonstrating the authenticity of the label (or document).  A valid signature identifies the signer (authentication) in such a way that the signer cannot deny having signed the message (non-repudiation) and that the message has not been tampered with in transit (integrity). Cryptographic signatures are readily available, and with other cryptographic techniques, are extensively used in e-commerce.

It is the expectation that all provenance evidence in this context, including labelling, would be cryptographically signed.

Some reporting facility should be made available, by which inconsistencies in the provenance of food can be flagged. Any such logged report also constitutes evidence, and its veracity should be established by the relevant organisation.

13. What additional information does the public need to be offered about food content and processing techniques? How can this information be conveyed in an easy to understand manner ?   

It is difficult to enumerate today all possible information that could be useful to the public. Beyond the traditional allergens and ingredients, CO2 footprint, ethical considerations, organic certifications may be of interest.

The regulatory framework should not restrict the information made available to public. Instead, it should enable transparency, and facilitate any relevant information to be made available. This will empower organisations to develop services that leverage that information. As indicated in our response to question 5, presentation services can take care of conveying information in an easy to understand manner.  By opening up provenance of food products, an ecosystem of original solutions will emerge, as it has emerged in many aspects of the Web.

Further points

We are not aiming to build another massive, centralised IT system, likely to be bound to failure, given the complexity of the supply chain. Lightweight, agile, Web oriented techniques have proven very successful for this kind of applications.

In this document, we are agnostic as to how data should be made available, whether open or restricted, free or payable for. It is likely that some aspects have to be open (inspection reports, reviews, origins of produces), whereas others may be confidential (which recipe was used for a given product).  We see provenance of food as an enabling platform for a variety of services to be developed, and potentially competitive advantage to be built upon.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s