Internet-of-Things (IoTs) are one of the most promising technologies in the present world. It connects people, processes and things. The increasing number of devices in IoT invoking various security and privacy issues. Authentication is one of them which should be measured at the very first level when a device comes into the network. Many authentication schemes are in use which follow the traditional cryptographic techniques of first-sign-then-encryption. The low performance and high complexity of these techniques also have urged the development of signcryption and lightweight signcryption techniques which are more beneficial for low-powered devices in IoTs. The literature study also provides a scope of improvement in the existing signcryption techniques. With this objectives, in this paper, the work shows a lightweight signcryption scheme for perception layer devices in IoT. It uses PHOTON-256 as a lightweight hash function which makes the proposed scheme less complex and faster. The performance of the scheme has been measured in terms of complexity, cost analysis and energy consumption. AVISPA validation is performed to evaluate security. The analysis of attacks, comparative experimentation and energy consumption confirm the efficiency of the scheme.

物联网（IoT）是当今世界上最有前途的技术之一。它连接人员，流程和事物。物联网中越来越多的设备引发了各种安全和隐私问题。身份验证是其中之一，当设备进入网络时，应该在第一层进行衡量。使用了许多身份验证方案，这些方案遵循了先签名后加密的传统加密技术。这些技术的低性能和高复杂性也促使人们开发了签密和轻量级签密技术，这对于物联网中的低功耗设备更有利。文献研究还提供了对现有签密技术的改进范围。为此，在本文中，该作品展示了一种用于物联网感知层设备的轻量级签密方案。它使用PHOTON-256作为轻量级的哈希函数，从而使所提出的方案更简单，更快速。已从复杂性，成本分析和能耗方面衡量了该计划的性能。进行AVISPA验证以评估安全性。攻击分析，对比实验和能耗证明了该方案的有效性。