Conventional cryptographic methods are not appropriate for IoT environments due to the specific IoT devices constraints, such as memory usage, time and computational costs. This leads to the emergence of the lightweight cryptography field. This paper investigates the different lightweight cryptographic design methods and proposes an IoT-based cryptographic method, called Ultra-Lightweight method (ULM), to enhance the performance, memory usage and security of IoT devises. The proposed method is based on three methods (i.e, bitslice, WTS and involutive), and thus accumulating their various advantages such as, memory use, efficiency and security. To validate our proposal, a cryptosystem is designed using ULM method. The designed cryptosystem is benchmarked based on the following metrics: performance (by measuring its execution time and the number of clock cycles needed to run it), the quantity of used memory (by measuring ROM and RAM consumption), and security level (by measuring its diffusion and confusion levels along with its resistance to linear and differential attacks). The results show that the cryptosystem designed using the proposed method outperforms existing methods in terms of memory use, security and performance.

由于特定物联网设备的限制，例如内存使用、时间和计算成本，传统的加密方法不适合物联网环境。这导致了轻量级密码学领域的出现。本文研究了不同的轻量级加密设计方法，并提出了一种基于物联网的加密方法，称为超轻量级方法 (ULM)，以提高物联网设备的性能、内存使用率和安全性。所提出的方法基于三种方法（即bitslice、WTS和involutive），从而积累了它们的各种优势，例如内存使用、效率和安全性。为了验证我们的提议，我们使用 ULM 方法设计了一个密码系统。设计的密码系统基于以下指标进行基准测试：性能（通过测量其执行时间和运行它所需的时钟周期数）、已用内存量（通过测量 ROM 和 RAM 消耗）和安全级别（通过测量其扩散和混淆水平以及对线性的抵抗力）和差异攻击）。结果表明，使用所提出的方法设计的密码系统在内存使用、安全性和性能方面优于现有方法。