TrustBlock: An adaptive trust evaluation of SDN network nodes based on double-layer blockchain

Abstract

The data layer devices in the Software Defined Network (SDN) play an important role in packet forwarding. However, whether the forwarding task can be efficiently completed by the node has not attracted enough attention. A method called TrustBlock is proposed in this paper, which introduces trust as a security attribute in SDN routing planning. Besides, in order to enhance the integrity and controllability of trust evaluation, the double-layer blockchain architecture is established. In the first layer, the behavior data of the node is recorded, and then the trust calculation is performed in the second layer. In the evaluation model, nodes' trust is calculated from three aspects: direct trust, indirect trust and historical trust. Firstly, from the perspective of security, blockchain is used to achieve identity authentication of nodes, after that, from the perspective of reliability, the forwarding status is used to calculate the trust value. Secondly, consensus algorithm is used to filter malicious recommendation trust value and prevent colluding attacks. Finally, the adaptive historical trust weight is designed to prevent the periodic attack. In this paper, the entropy method is used to determine the weight of each evaluation attribute, which can avoid the problem that the subjective judgment method is not adaptable to the weight setting. Simulation results show that the detection rate of the TrustBlock is up to 98.89%, which means this model can effectively identify the abnormal nodes in SDN. Moreover, it is attractive in terms of integrity and controllability.

BMC‐SDN: Blockchain‐Based Multicontroller Architecture for Secure Software‐Defined Networks

“…DistBlockNet [16] verifies and validates the version of the flow rule table using a blockchain and downloads the latest flow rules for the IoT forwarding devices. TrustBlock [17] computes the trust values of SDN nodes based on blockchain. The consensus mechanism of the blockchain is used to filter out dishonest nodes that provide unfair recommendations.…”

A semi-centralized blockchain system with multi-chain for auditing communications of Wide Area Protection System

“…Blockchain is a virtual chain of chronologically ordered blocks. Each valid node keeps a copy of the blockchain ledger and uses a consensus mechanism to make all nodes agree on the content of the transaction data, thus avoiding the problem of single point failure [ 30 ]. Fig 2 offers an example of the block structure.…”

SDN‐chain: Privacy‐preserving protocol for software defined networks using blockchain

“…The proposed Blockchain-based SDN architecture uses the "Modified Delegated Proof of Stake (M-DPOS)" protocol as a consensus algorithm 48 to ensure the services like security, integrity, transparency, and decentralization. There is a flaw in the original "Delegated Proof of Stake (DPOS)" algorithm of being susceptible to the centralization of the network if a limited number of block producers is in the network.…”