Removable security modules and related methods

摘要

Example removable security modules for use with process control devices and related methods are disclosed. An example removable security module includes a body configured to be removably coupled to the process control device and a memory disposed in the body with a shared secret stored in the memory. The example removable security module also includes a processing unit disposed in the body, coupled to the memory and configured to read information from the process control device, compare the information to the shared secret and authenticate the process control device based on the comparison.

主权项

1. A removable security module for use with a first process control device and a second process control device, comprising:
a body to be removably coupled to the first process control device or the second process control device; a memory disposed in the body, the memory to store a first secret; and a processing unit disposed in the body and coupled to the memory, the processing unit to: read authentication information from the first process control device; perform a comparison to compare the authentication information to the first secret; authenticate the first process control device based on the comparison; determine whether a request or command associated with a first operator has been received; generate and provide a second secret to a second operator; receive an action from the second operator to return the second secret to the first operator or to the security module; authorize the first control device to process the request or command when the second secret is returned; and enable the second process control device to operate after being coupled to the module after the module is removed from the first process control device without authenticating the second process control device.