Abstract
Security of IoT devices is getting a lot of attention from researchers as they are becoming prevalent everywhere. However, implementation of hardware security in these devices has been overlooked, and many researches have mainly focused on software, network, and cloud security. A deeper understanding of hardware Trojans (HTs) and protection against them is of utmost importance right now as they are the prime threat to the hardware. This paper emphasizes the need for a secure hardware-level foundation for security of these devices, as depending on software security alone is not adequate enough. These devices must be protected against sophisticated attacks, especially if the groundwork for the attacks is already laid in devices during design or manufacturing process, such as with HTs. This paper will discuss the stealthy nature of these HT, highlight HT taxonomy and insertion methods, and provide countermeasures.
Highlights
The extremely complex IoT ecosystem involves a large number of interconnected IoT devices, and this number is expected to significantly increase within a few years
The analysis showed that only a few logical gates are enough to trigger an hardware Trojans (HTs) without any noticeable variations in the circuit parameters
IoT devices cannot be completely secure until we lay a strong foundation of secure hardware for them
Summary
The extremely complex IoT ecosystem involves a large number of interconnected IoT devices, and this number is expected to significantly increase within a few years. The security of the IoT environment must be given a high priority while developing, configuring, and updating the devices to ensure optimal performance throughout their lifetime. Protection of IoT devices against cyber-attacks can help achieve a high level of confidentiality, integrity, and availability with authorized access to the users. IoTs are an attractive target for adversaries because of their easy accessibility, vulnerabilities, and the quality of data they hold. IoT devices are usually connected to other devices on the same network, which puts all other devices at risk if one of them gets compromised. Security of these devices regardless of their size is paramount
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