Industrial Device Fingerprinting for Legacy Signal Authentication
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Solution Overview
Problem
Existing industrial process devices lack secure communication capabilities, particularly with legacy devices that have minimal to no security features, making them vulnerable to unauthorized interference.
Innovation Solution
Industrial controller devices obtain a unique fingerprint signal from the output of industrial peripheral devices based on recurring physical properties, enabling authentication and secure communication by validating device identity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If legacy industrial process devices are used, then device complexity is reduced and cost is lowered, but security capability deteriorates making them vulnerable to unauthorized interference
Solution Approach 1:
The patent introduces an intermediary authentication mechanism that analyzes inherent physical properties of output signals from legacy devices. This mediator layer enables security validation without modifying the legacy devices themselves, resolving the contradiction between maintaining simple legacy devices and achieving secure communication.
Solution Approach 2:
The patent replaces traditional mechanical security features (such as hardware security modules or encrypted communication protocols) with a signal analysis approach that extracts fingerprint information from inherent physical properties of output signals. This substitution enables security capabilities in legacy devices without adding complex hardware or software modifications.
2Reliability
If modern industrial process devices with security features are deployed, then security capability is improved, but device complexity increases and replacement costs rise
Solution Approach 1:
The patent creates a digital copy or fingerprint of the inherent physical signal characteristics from legacy devices. This fingerprint serves as a security identifier that can be validated without replacing the physical devices, achieving security capabilities while maintaining the original simple device architecture.
Solution Approach 2:
The patent changes the approach from modifying device parameters (hardware/software) to analyzing signal parameters. By extracting security information from the physical properties of output signals rather than changing device configuration, the system achieves security without increasing device complexity.
3Reliability
If security authentication is implemented for all devices, then security capability is improved, but communication compatibility with legacy devices deteriorates
Solution Approach 1:
The patent enables legacy devices to provide their own authentication credentials through their inherent physical signal characteristics. The devices self-generate unique fingerprints based on their natural output signal properties, eliminating the need for external authentication infrastructure and maintaining compatibility while enabling security.
Data Source
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AI summary
A system is configured for enabling secure communications among industrial process devices of an industrial system. The industrial system comprises industrial process devices such as an industrial peripheral device and an industrial controller device. The industrial peripheral device is configured to generate an output signal having one or more recurring physical properties. The industrial controller device is configured to operate in training mode to obtain a unique fingerprint signal from the output signal of the industrial peripheral device. The unique fingerprint signal is indicative of the one or more recurring physical properties of the output signal and corresponds to an identity of the industrial peripheral device. The industrial controller device is also configured to operate in operational mode to validate an identity of the industrial peripheral device based on the unique fingerprint signal, thereby enabling secure communications among the industrial peripheral device and industrial controller device.