1 Internet of Things and Security Abstract Internet of things devices application in daily life activities has been on the rise since the development of the technology. Its application has affected all spheres of human life from home systems, smart cities, and healthcare in industries. However, the use of these devices is accompanied by threats to the users as well as the environment around them. The security requirements of these devices include authenticity, availability, integrity, and confidentiality. The data carried by these devices and being transferred from one node to another is critical and needs to be well secured to avoid accidents or even deaths by the users. In different instances, these devices have been hacked and caused harm to the users in cases such as the nuclear facility attack that caused imminent damage. The lightweight cryptographic algorithm's security protocol of these devices could be used to improve the safety of the devices. The current security protocols have, in various instances, been compromised by the malware and the ransomware that are used by hackers to attack these devices. The knowledge of the security of the Internet of things will ensure that more security measures are taken to improve the current security and achieve the requirements for data protection. Keywords: cryptographic algorithms, security protocol, Internet of things and cloud 2 Contents Abstract ........................................................................... ...
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