AP-CDE: Cost-Efficient Authentication Protocol for Cross-Domain Data Exchange in IIoT

The Industrial Internet of Things (IIoT) is a new network paradigm emerging from the Internet of Things (IoT). It is primarily used in smart factories to promote smart manufacturing and increase productivity. Smart industrial devices collect real-time data from other domains (i.e., intelligent factories) that collaborate on the same transaction and transmit crucial data via a public internet channel. When applied to resource-constrained smart industrial communication devices, this process causes issues in communication security and privacy. Consequently, this study develops a cost-effective authentication protocol for cross-domain data exchange (AP-CDE) in IIoT. Anticollision hash functions, bitwise Exclusive-or operations, and Chebyshev polynomial operations are used in this protocol. AP-CDE security is achieved by using precise formal and nonmathematical (informal) analysis methods. The analysis results show that the developed protocol can withstand various well-known threatening attacks. Finally, a detailed comparative analysis between the AP-CDE and other interrelated protocols is used to verify that the AP-CDE outperforms other protocols in terms of security and functional characteristics, communication overheads, and computational costs.