An authentication process for authenticating the cables 100, the devices 128, and/or the control elements or subsystems 202 connected to the cables 100 is performed based upon the unique security credentials. For example, in embodiments, a cable 100 and a device 128 are operable to bi-directionally communicate with one another based on the unique security credentials (e.g., based upon the authentication process). Further, in the secure process control system 200 disclosed herein, multiple (e.g., every) cable 100, device 128, control element or subsystem 202 (e.g., I/O modules, power supplies, physical interconnect devices, etc.) of the process control system 200 is provisioned with security credentials for providing security at multiple (e.g., all) levels of the process control system 200. Still further, the elements can be provisioned with the unique security credentials (e.g., keys, certificates, etc.) during manufacture (e.g., at birth), and can be managed from birth by a key management entity 224 of the process control system 200 for promoting security of the process control system 200.