The extensive growth of the Internet of Things (IoT) devices leads to the evolution of the broad range of smart applications in numerous fields such as smart home, wearable, education, agriculture, health care, transportation and many more. But security for IoT devices is still a challenging issue as many attacks are possible in the environment. Therefore strong security requirements are an important concern to safeguard the IoT smart devices. The sensor network has to select an efficient encryption algorithm to provide secure communication between sensor nodes. The basic requirement for encrypted communication is key establishment and distribution. The currently available key management process involves large computational overhead, energy consumption, and delay. This makes the network inefficient since sensor nodes have limited bandwidth capacity. The main aim of this paper is to establish a strong key management mechanism to overcome the issues in the current cluster based key management technologies. The work proposed a secure hash key-based key management scheme for the cluster based network environment. The proposed scheme considers the two-level verification process, a one-hop way for the nodes within the cluster and a multi-hop way for the nodes outside the transmission range. The work done is examined through simulation by varying the number of malicious nodes in the environment. The result shows that the rate of packet loss has been reduced when compared with a one-hop way of key management solution. The proposed work also enhances the performance of the network by lowering the energy, computational overheads, and delay.

物联网 (IoT) 设备的广泛增长导致了智能家居、可穿戴设备、教育、农业、医疗保健、交通运输等众多领域的广泛智能应用的发展。但物联网设备的安全性仍然是一个具有挑战性的问题，因为环境中可能存在许多攻击。因此，强大的安全要求是保护物联网智能设备的一个重要问题。传感器网络必须选择一种有效的加密算法来提供传感器节点之间的安全通信。加密通信的基本要求是密钥的建立和分发。当前可用的密钥管理过程涉及较大的计算开销、能耗和延迟。这使得网络效率低下，因为传感器节点的带宽容量有限。本文的主要目的是建立一个强大的密钥管理机制，以克服当前基于集群的密钥管理技术存在的问题。该工作为基于集群的网络环境提出了一种基于安全散列密钥的密钥管理方案。所提出的方案考虑了两级验证过程，集群内​​的节点采用单跳方式，传输范围外的节点采用多跳方式。通过改变环境中恶意节点的数量，通过模拟来检查所做的工作。结果表明，与单跳方式的密钥管理解决方案相比，丢包率有所降低。拟议的工作还通过降低能量来提高网络的性能，