  In this era of explosive growth in technology, the internet of things (IoT)
has become the game changer when we consider technologies like smart homes and
cities, smart energy, security and surveillance, and healthcare. The numerous
benefits provided by IoT have become attractive technologies for users and
cybercriminals. Cybercriminals of today have the tools and the technology to
deploy millions of sophisticated attacks. These attacks need to be
investigated; this is where digital forensics comes into play. However, it is
not easy to conduct a forensic investigation in IoT systems because of the
heterogeneous nature of the IoT environment. Additionally, forensic
investigators mostly rely on evidence from service providers, a situation that
can lead to evidence contamination. To solve this problem, the authors proposed
a blockchain-based IoT forensic model that prevents the admissibility of
tampered logs into evidence.
