Lightweight Cryptography in IIoT the Internet of Things in the Industrial Field

Lightweight Cryptography is one of the current topics of Cryptology. A great variety of "lightweight" algorithms have been designed to guarantee Confidentiality, Authenticity and Integrity of data in devices of what it is known as the Internet of Things (IoT). Some of them arise from the academic field and are applied in the Industry, while some others are proprietary, developed by companies to achieve their security requirements. This paper presents the state of the art of some of these algorithms used in different IIoT devices. Their general cryptological features are briefly described, as well as the different attacks to which they were subjected. Finally, new trends for the design and implementation of lightweight algorithms are listed.