Abstract
With the continuous enrichment of the Internet of Things (IoT) applications, the demand for value exchange and collaborative control between heterogeneous IoT applications is increasing. However, the user management space varies depending on the IoT application, where the security domain stands as an example. It is one of the key technologies of data sharing between heterogeneous IoT organizations to cross the boundary of the security domain and verify the identity and authority of users in other security domains. Aiming at the slow speed of authentication protocol authority authentication during cross‐domain access and without considering the actual cross‐domain situation, the same cryptographic system parameters are used for all communication nodes in a cross‐domain environment. This article proposes a heterogeneous Internet of Things data access authority authentication scheme between applications. Based on certificate‐less public key cryptography and smart contract technology, a certificate‐less cross‐domain authentication scheme that supports parameter differentiation is designed and implemented. The theoretical and empirical analyses, comparing the communication volume, identity signature, and verification calculation cost, validated that the method proposed improves the cross‐domain identity authorization authentication ability and supports the use of differentiated cryptographic system parameters among different IoT applications.
Highlights
The increasing popularity of the Internet of Things (IoT) has resulted in the growth of connected devices, such as sensors and smart devices, at an alarming rate, which have become an integral part of daily human life [1,2,3,4,5]
In terms of overall authentication calculation time, the proposed scheme is significantly better than the related cross-domain authentication schemes IRBA and MCPSP based on blockchain technology, which only takes 6.446 ms
Through theoretical analysis and security classification, the correctness of the scheme is proved, and it can support different security domains using different master private key/master public key pairs and supports a, which enhances the security of cross-domain authentication
Summary
The increasing popularity of the Internet of Things (IoT) has resulted in the growth of connected devices, such as sensors and smart devices, at an alarming rate, which have become an integral part of daily human life [1,2,3,4,5]. The centralized IoT communication model faces the era of the explosive growth of big data and brings many drawbacks, such as high-latency response, lack of security, and a large amount of workload. These peer-to-peer networks and cloud environment-based traditional centralized IoT data sharing solutions cannot prevent the single points of failure and the attacks targeting the centralized storage. Blockchain technology with the characteristics of a decentralized, fully distributed P2P network, transaction transparency, nontampering, and encryption algorithms to ensure security is considered an effective means to achieve decentralized authentication [16,17,18].
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