Assembly control with authentication of user

A method of operating an embedded processing system comprising:

• providing a plurality of user credential files that include an identifier for each of a plurality of users, and tasks that are authorized for each of the plurality users, and encrypting the credential files;
• storing expected valid user information and access information at a memory within the embedded processing system;
• receiving one of the user credential files at the embedded processing system, and checking the received user credential file against the stored expected valid user information and access information;
• denying the user access should the received user credential file not be validated from the expected user information;
• allowing the user access if the received user credential file matches the expected valid user information;
• setting an access control list of authorized task roles by accessing the access information in the memory;
• and
• allowing access for the user to the authorized task roles during a session and denying access for any other task roles.

An assembly comprising a mechanical system and an embedded processing system for the mechanical system, the embedded processing system having:

• an embedded processing system and access combination comprising:
• processing circuitry;
• a memory system;
• a plurality of user credential files, the user credential files including an encrypted user identifier, and an encrypted list of authorized task roles the particular user would have within the embedded processing system;
• expected credentials from the user credential files are stored in the memory system;
• and
• the processing system being programmed to receive a user credential file from a user, and compare expected credentials within the memory system to identify if the user is an authorized user, the processing system programmed to allow access to an authorized user and deny access to an unauthorized user and determine what task roles are authorized for the authorized user, and deny access for the authorized user to other tasks.