Research And Application Of Wireless Seneor Network Security Based On Merkle Tree

The security of wireless sensor networks has a long history,and due to the rapid development of Internet of Thi'ngs technology,the security issues are more important because wireless sensor networks are the perception layer of Internet of Things.The starting point of its security issues are the same as general network,need to solve the key issues,certification issues and the accuracy of the message.The merkle tree is a binary tree that consists of a root node,a set of intermediate nodes,and a set of leaf nodes.The lowermost leaf contains stored data or its hash,mainly used in security area,such as digital signatures.Blockchain is an important underlying technology for bitcoin,and it contains information on bitcoin transactions and can verify the validity of a transaction.So blockchain technology and merkle tree can be used to solve the security problems of wireless sensor networks.In this paper,the structure and characteristics of merkle tree,existing merkle tree traversal algorithm,the existing problems of WSN security and the existing schemes,the structure and characteristics ofblockchain,and the future,architecture,source code,development process of hyperledger platform are deeply studied.Based on the above research,a wireless authentication scheme and an entity authentication scheme for wireless sensornetworks are proposed.The two schemes use the merkle tree structure to solve the problems of many keys,verification complexity and verification delay of the traditional scheme,and use the blockchain to ensure the security of the network layer.After that,based on the traditional merkle tree traversal algorithm,an improved algorithm is proposed to optimize the time complexity.The improved algorithm is implemented in python language,which verifies the optimization effect compared with the traditional algorithm.Finally,hyperleger platform was used to develop a system to verify the proposed broadcast authentication and entity authentication scheme,which proves the correctness and practicability of the scheme.The main goal of this article is achieved.