Blockchain

What is a Blockchain?

A blockchain is a distributed database in which records — known as blocks — are stored chronologically and each linked to its predecessor via a cryptographic hash. This chain structure makes retroactive manipulation practically detectable, because any change to a block would invalidate all subsequent hashes. Every participant in the network holds a copy of the entire chain; there is no single central database operator. Depending on the model, a distinction is made between public blockchains, where anyone can participate, and permissioned or consortium blockchains, where only authorized organizations may read and write. In the B2B context of logistics and supply chain, consortium models are almost exclusively relevant, as they offer better control over governance, data privacy, and performance.

How does blockchain work in practice within the supply chain?

In a typical scenario, multiple parties — manufacturers, freight forwarders, customs authorities, retailers — record events such as goods handovers, temperature logs, or document approvals on a shared blockchain. Each entry carries a timestamp and cannot be silently altered after the fact. Smart contracts can automatically execute rules — for example, releasing a payment upon confirmed delivery — without any party needing to manually notify another.

In practice, the value depends heavily on how data enters the blockchain. A barcode scan or IoT sensor only delivers reliable data if the upstream processes are sound. The blockchain itself does not guarantee data quality at the source — it only secures what has already been recorded. This is known as the oracle effect and is one of the most common points of criticism.

What matters when making a selection?

Before evaluating a blockchain solution, it is worth honestly assessing whether the use case could also be addressed with a conventional database, an API integration, or a centralized platform operator. Blockchain provides a genuine advantage when the following conditions apply:

• Multiple independent organizations need to share data without fully trusting a single operator.
• The immutability of stored data has legal or regulatory value.
• The governance question — who writes, who reads, who administers — is clearly defined in advance.

Additional decision parameters include the integration effort with existing ERP, WMS, and TMS systems, ongoing platform operating costs, data privacy requirements, and the question of which partners are actually willing and able to participate. Many pilot projects in logistics fail not because of the technology, but because not all necessary partners come on board or governance structures remain unclear. Whether and when blockchain is worthwhile for a specific use case depends on the vendor and context and should be evaluated on a case-by-case basis.