A lightweight consensus method based on block chain sdn architecture and sdn switch
An SDN architecture and switch technology, applied in the field of communication network security, can solve the problems of low efficiency of consensus algorithm and high system resource occupancy rate, and achieve the effect of reducing communication overhead, improving security and efficiency, and ensuring performance.
Active Publication Date: 2022-06-21
云南电网有限责任公司信息中心
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[0005] The purpose of the present invention is to provide a lightweight consensus method and SDN switch based on block chain SDN architecture, which combines the characteristics of SDN network and its switching equipment, and the randomness based on hash process and signature value in block chain , transforming the competition for the right to generate blocks into the competition for the minimum signature value, realizing a consensus method that does not increase any resource consumption, and at the same time can guarantee the randomness and fairness of the consensus, to solve the efficiency of the existing blockchain-based SDN architecture consensus algorithm Low and high system resource usage
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[0055] Specifically, since the digital signature is generated by the host and transmitted with the data frame, only the switch that has actually forwarded the frame can obtain the information, so it is used as the proof of frame forwarding. The generation of the digital signature will be determined in the semi-random selection of the verification mechanism. described in detail. The consensus algorithm based on the frame forwarding proof includes three stages: the proof collection stage, the block right consensus stage, and the block consensus stage. The time for collecting the digital signature (the frame forwarding proof) is represented as T c , denoting the time to reach consensus on the block right as T w , denoting the time when the new block is on the chain as T u , denoting the consensus period as T f , then there is T f =T c +T w +T u .
[0056] In order to better describe the consensus algorithm based on frame forwarding proof, the following definition is made: ...
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The present invention discloses a lightweight consensus method of SDN architecture based on blockchain and an SDN switch, including: S1, obtaining the digital signature corresponding to the directly connected host; S2, comparing and obtaining the local minimum digital signature from the digital signature ; S3. Acquiring the minimum digital signature sent by other SDN switches; S4. Obtaining the current minimum digital signature from the comparison between the minimum digital signature and the local minimum digital signature; S5. Consistent with the current minimum digital signature and the local minimum digital signature When there is consistency, it is determined that the current SDN switch has obtained the right to produce blocks. When there is inconsistency, it is determined that the current SDN switch does not have the right to produce blocks; S6. Generate a new block and publish the new block to Other SDN switches; S7. Receive the new block, verify the new block, and send the verification result to the SDN switch that obtained the block right. The present invention improves consensus efficiency through an optimized consensus algorithm.
Description
technical field [0001] The invention relates to the field of communication network security, in particular to a blockchain-based lightweight consensus method for SDN architecture and an SDN switch. Background technique [0002] At present, in the SDN network, the device access is a centralized authentication method with the controller as the core. Under this centralized authentication architecture, the vulnerability of the network is high. Once the controller is attacked, the entire network will be affected. Therefore, the SDN controller architecture has serious centralization problems, such as single point of failure and malicious internal administrators. This problem makes the reliability and credibility of the flow table information recorded in the controller questioned, and the existing solutions cannot To ensure the non-repudiation of flow table information, attacks such as tampering cannot be avoided; the security and efficiency of the prior art network system are poor...
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IPC IPC(8): H04L9/32H04L9/06
CPCH04L9/3247H04L9/0643H04L9/50
Inventor 陈何雄罗宇薇罗震宇杭菲璐郭威谢林江何映军毛正雄张振红韦云凯杨宁李良许茂林
Owner 云南电网有限责任公司信息中心