1. A certificate authority device, comprising: a memory that stores executable instructions; and a processor, coupled to the memory, that facilitates execution of the executable instructions to perform operations, comprising: communicating with an automation device via a local area network consisting of a set of networked devices, comprising the certificate authority device and the automation device, that communicate via a local area network protocol; and generating for the automation device a digital certificate that cryptographically authenticates an identity associated with the automation device.