Internet of Things (IoT) involves all the surrounding with smart devices to Internet and has been gaining more recognition because it provides substantial benefits in comparison to other systems. Further, due to the decentralized nature of IoT network many types of active and passive attacks are possible. The distributed denial of service is the active type of attack which reduces network performance. In this research work, technique of mutual authentication is designed which detects and isolates malicious nodes from the network and thus improves session resumption technique for minimizing execution time. The proposed technique has been implemented and also compared with existing technique in terms of certain parameters. These parameters are bandwidth consumption, routing overhead, and packet delivery ratio. The performance of proposed technique is evaluated in NS2 and results shows that proposed algorithm performs well in comparison to existing results.

物联网（IoT）涉及到智能设备到Internet的所有周围环境，并获得了更多的认可，因为与其他系统相比，它提供了很多好处。此外，由于物联网网络的分散性质，许多类型的主动和被动攻击都是可能的。分布式拒绝服务是一种主动攻击类型，会降低网络性能。在这项研究工作中，设计了相互身份验证技术，该技术可以检测恶意节点并将其与网络隔离，从而改进了会话恢复技术以最大程度地缩短了执行时间。所提出的技术已经实施，并且在某些参数方面也与现有技术进行了比较。这些参数是带宽消耗，路由开销和数据包传递率。