Blockchain in Industrial IoT: Foundations and Applications – Part 1

As 2018 draws to a close, blockchain is nearing the Gartner Hype Cycle’s “trough of disillusionment.” While that term may sound ominous, the technology continues to dominate headlines. For many, blockchain is a powerful tool awaiting the right industry fit.

Cryptocurrency remains the most visible use case, yet its enormous energy consumption and volatility keep many engineers questioning its relevance. In contrast, industrial sectors are gradually adopting blockchain for supply‑chain traceability, inventory control, and transactive energy management. If you’re using RTI Connext DDS in mission‑critical real‑time systems, you’ll find that cryptocurrency and supply‑chain functions are not typically the primary drivers for your use cases.

RTI’s dedicated research team has partnered with the Department of Energy to explore how blockchain can secure industrial systems. Our work spans the Army, Navy, Air Force, DARPA, DOE, and Missile Defense, but this article focuses on the implications for real‑time industrial environments.

What Is Blockchain Technology?

Blockchain distributes ledger control across multiple, often untrusted, participants, eliminating a single point of failure. Each participant maintains a local copy of the ledger, and all blocks are cryptographically linked, ensuring that tampering requires altering every copy simultaneously.

Data is stored in blocks that can contain virtually any information—from contracts and patents to sensor readings and system states. In industrial contexts, the most common entries are sensor data, operational logs, and configuration snapshots, all immutably preserved.

The chain’s design forces each new block to reference its predecessor, creating a tamper‑evident history. Any attempt to modify past blocks would necessitate rewriting the entire chain across all nodes—a feat that is computationally prohibitive.

When Is Blockchain Needed?

Blockchain shines when multiple autonomous entities need a shared, tamper‑proof record without trusting a central arbiter. In single‑party scenarios, a write‑once database may suffice. However, in multi‑company ecosystems—such as supply chains, joint ventures, or shared industrial facilities—blockchain can provide the necessary data integrity.

Traditional Transactional Blockchain

Most public blockchains record transactions—state changes that are immutably captured. The ledger only advances once a transaction is validated and appended. This model introduces latency, especially when transactions compete for inclusion, as seen in Bitcoin’s typical one‑hour confirmation window.

While transactional blockchains fit some industrial use cases, their latency can be prohibitive for real‑time applications. We will explore solutions to this challenge in subsequent posts.

Blockchain for Industrial Systems

Our focus is on ingesting specific data from the secured Connext DataBus and writing it directly to separate, independently owned ledgers. Since we are merely observing the system rather than controlling its state, there is no transaction conflict, and latency is negligible.

By designing a blockchain that operates outside the control‑flow path, we eliminate the traditional bottlenecks associated with transaction validation. This architecture is well suited for real‑time industrial environments, ensuring data integrity without sacrificing performance.

Integrating this blockchain layer into an existing DDS deployment is straightforward and can be performed without downtime. The choice of blockchain design and the specific use case dictate the optimal implementation strategy.

In Part 2, we will dive into an Oil & Gas use case, detail a prototype implementation, and explain why blockchain is only one component of the solution.