Digital rights management system and method

a digital rights management and digital rights technology, applied in the field of industrial control systems, can solve the problems of little or no mechanism for ensuring communication between industrial control devices, no viable means of controlling and managing access to industrial control programs and documents, and failure to provide reliable and secure communication devices such as controllers and i/o devices, and achieve the effect of optimal communication security
US20050229004A1Inactive Publication Date: 2005-10-13ROCKWELL AUTOMATION TECH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ROCKWELL AUTOMATION TECH
Publication Date
2005-10-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention concerns application of digital rights management to industrial automation devices including programmable logic controllers (PLCs), I / O devices, and communication adapters. Digital rights management involves a set of technologies for controlling and managing access to device objects and / or programs such as ladder logic programs. Access to automation device objects and / or programs can be managed by downloading rules of use that define user privileges with respect to automation devices and utilizing digital certificates, among other things, to verify the identity of a user desiring to interact with device programs, for example. Furthermore, the present invention provides for secure transmission of messages to and amongst automation devices utilizing public key cryptography associated with digital certificates.
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Description

TECHNICAL FIELD

[0001] The present invention relates generally to industrial control systems and more particularly towards digital rights management and secure communication to and amongst industrial automation devices. BACKGROUND

[0002] Industrial controllers are special-purpose computers utilized for controlling industrial processes, manufacturing equipment, and other factory automation, such as data collection or networked systems. In accordance with a control program, the industrial controller, having an associated processor (or processors), measures one or more process variables or inputs reflecting the status of a controlled system, and changes outputs effecting control of such system. The inputs and outputs may be binary, (e.g., on or off), as well as analog inputs and outputs assuming a continuous range of values.

[0003] Measured inputs received from such systems and the outputs transmitted by the systems generally pass through one or more input / output (I / O) modules. These I...

Claims

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