According to (Alsaidi & Kausar (2018), “It is expected that by 2020, around 25 billion objects will become the part of global IoT network, which will pose new challenges in securing IoT systems. It will become an easy target for hackers as these systems are often deployed in an uncontrolled and hostile environment. The main security challenges in IoT environment are authorization, privacy, authentication, admission control, system conformation, storage, and administration” (p. 213). 
Discuss and describe the difference between a black hole attack and a wormhole attack.