Shehryar Raza, Muhammad

Attestation of Internet of Things (IoT) nodes in Industry 4.0 Scenario

Security in Industry 4.0 is a modern-day problem. Integrity verification for the nodes in Industry 4.0 can be solved by attestation. Attestation is about confirming that the state of a prover node is what it really should be. The Efficiency of this process for a large number of nodes is being researched upon in recent years. The assumptions regarding the scenarios are either very general or too specific. Another problem is that most of the attestation schemes are so complex and cumbersome for the prover nodes that attestation itself sufficiently obstructs the actual working of the nodes. Lastly, in most schemes, for the verifier node to conclude about the node's state, it needs to perform very complex computations such as encryption, decryption, and other such operations. For the industry 4.0 scenario, keeping in view well-stated assumptions regarding the scenario, we have presented a scheme that is least obstructive for the prover nodes and verifier-friendly at the same time so that it does not need to perform complex and cumbersome computations for each node in the network. Our proposed scheme relies on hash chains and organizes the prover nodes in layers. The verifier node can report the problematic node by employing the simple set intersection operations. We conclude that our scheme results in reduction of load on provers as well as the verifier, network traffic, runtime, energy, and communication costs.