As the number of IoT devices enterprises deploy continues to grow, so too does the risk of a data breach. The incorporation of Public Key Infrastructure (PKI) using digital certificates plays such an important role in the development of a secure IoT device. Despite common misconceptions, PKI is a perfect match for the exploding IoT sector, providing trust and control at scale and in a user-friendly way that traditional authentication methods like tokens and passwords cant do. Digital certificates used for mutual authentication can be used to authenticate users to devices behind the scenes with nearly no user interaction.”]
Source: https://www.csoonline.com/article/3250854/keys-to-securing-the-internet-of-things.html