Out-of-Band Channels for Secure Automation Node Provisioning
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Solution Overview
Problem
Process automation systems face challenges such as node malfunctions, network overload, data sensitivity, and security vulnerabilities, particularly for newly added devices, which can lead to data interception and compromised network integrity.
Innovation Solution
Establishing an out-of-band communication channel between process automation nodes using wired or wireless technologies like Wi-Fi Direct, USB, NFC, or Bluetooth, allowing for secure authentication, load distribution, redundancy, and network traffic management, thereby creating a private channel for data exchange and shielding sensitive traffic from malicious content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a process automation node is recently added to the network, then the system gains new functionality and capacity, but the node becomes vulnerable to malware and attacks due to lack of security mechanisms
Solution Approach 1:
The patent establishes an out-of-band communication channel before the newly added node is fully integrated into the process automation network. This preliminary secure channel allows security credentials, configuration data, and authentication information to be transmitted to the node before it becomes vulnerable to network-based attacks. The node receives security mechanisms in advance through this isolated channel, ensuring it is protected before joining the main network.
Solution Approach 2:
The out-of-band communication channel acts as an intermediary between secure external systems and the newly added node. This separate communication path, using technologies like USB, NFC, or Bluetooth, mediates the transfer of critical security information without exposing the node to the process automation network until it is properly secured. The intermediary channel isolates the node from potential threats during the vulnerable provisioning phase.
2Reliability
If an out-of-band communication channel is established for security purposes, then new devices are protected from malicious content, but the device complexity increases due to additional communication interfaces and protocols
Solution Approach 1:
The patent segments the communication functionality into two distinct channels: the primary process automation network interface and the secondary out-of-band communication interface. This segmentation allows each interface to be optimized for its specific purpose - the main interface for operational communication and the out-of-band interface for secure provisioning. By dividing communication functions, the system manages complexity through clear separation of concerns rather than attempting to secure a single multifunctional interface.
Solution Approach 2:
The out-of-band communication capability is implemented with local quality - it is selectively applied only where needed during the provisioning phase. The patent allows nodes to have this additional interface for initial security setup, but the complexity is localized to the provisioning process rather than requiring continuous use of additional interfaces. Once the node is secured and integrated, the out-of-band channel's role diminishes, reducing the operational complexity while maintaining the security benefit during the critical initial phase.
Data Source
AI summary
Implementations are described herein for leveraging an “out-of-band” communication channel between nodes of a process automation system. In various implementations, an out-of-band communication channel may be established between two or more process automation nodes of a process automation system. The out-of-band communication channel may be outside of a process automation network through which the two or more process automation nodes are communicatively coupled with other process automation nodes of the process automation system. The two or more process automation nodes may cooperate with one or more of the other process automation nodes to implement an at least partially automated process. One or more characteristics of the process automation system may be monitored, and based on the monitoring, traffic may be selectively diverted from the process automation network to the out-of-band communication channel.