With the rapid development and widespread adoption of wireless sensor networks (WSNs), security has become an increasingly prominent problem. How to establish a session key in node communication is a challenging task for WSNs. Considering the limitations in WSNs, such as low computing capacity, small memory, power supply limitations and price, we propose an efficient identity-based key management (IBKM) scheme, which exploits the Bloom filter to authenticate the communication sensor node with storage efficiency. The security analysis shows that IBKM can prevent several attacks effectively with acceptable computation and communication overhead.
With the wide adoption of wireless sensor network (WSN), security problems emerge as a challenging issue because of the limited computational power and energy of the sensor nodes. Furthermore, the deployment of WSN in the hostile area with a large number of nodes also poses a threat. In this paper, we proposed a new efficient key management scheme based on Elliptic Curve Cryptography (ECC) and AVL tree for large scale WSNs. In our scheme the Elliptic Curve Paillier Encryption (ECPE) cryptography is adopted for communication and the AVL tree is used to store the neighbors' ID and public key. The number of keys used in our scheme is smaller than the proposed schemes as we store these keys using AVL tree to shorten the search time. Regular key updates are also designed to further improve the security of the whole network. Our scheme has a good scalability where the node addition and deletion are supported. Experimental results and analysis show our scheme can significantly reduce the energy consumed by the node and reduce the memory and computational overhead.
In wireless sensor networks (WSNs), massive amounts of nodes, volatile network topology and limited resources (such as energy, computing power, storage, bandwidth, and so on) make the traditional security scheme cannot be directly applied to WSNs. Identity-based encryption (IBE) is becoming a hot research topic since it does not need PKI and complicated certificate operations. In this paper, a novel identity-based security scheme is proposed on the basis of IBE. Each cluster head can perform as a private key generator (PKG) in case that the only PKG is captured, which will lead to the entire network disabled. The proposed scheme can reduce the consumption of key resources and improve the security of the entire network by dispersing PKG function. The analysis shows that the scheme is more secure and efficient by comparing with traditional public key and symmetric key techniques.
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