Industrial Multiplexer Access Control With Physical Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Industrial control systems face significant security risks due to remote access vulnerabilities, allowing malicious individuals to disrupt critical infrastructure by gaining unauthorized access through weak authentication methods and cyberattacks, which are difficult to detect and prevent with current firewalls and device login credentials.
Innovation Solution
Implementing a network of multiplexers with a physical authentication device that requires a trusted individual's physical presence and biometric verification to access the system, generating encrypted tokens for secure remote access and automatically reentering lockdown mode to prevent prolonged unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If remote access is enabled for maintenance and service, then system productivity is improved, but security vulnerability increases allowing unauthorized access
Solution Approach 1:
A physical authentication device acts as an intermediary between the remote user and the multiplexer. The device must be physically present at the multiplexer location to authorize remote access, creating a mediator that prevents direct unauthorized access while enabling legitimate remote maintenance and service operations.
2Ease of operation
If device login credentials are used for access control, then ease of operation is improved, but security reliability deteriorates due to weak passwords and credential theft
Solution Approach 1:
The patent replaces the mechanical/password-based authentication system with a biometric authentication system. The physical authentication device captures biometric data (fingerprint, facial recognition, or voice) to verify user identity, substituting weak password credentials with more reliable biometric verification while maintaining ease of operation.
3Reliability
If firewalls are implemented to block unauthorized access, then security is improved, but they cannot prevent attacks from trusted sources
Solution Approach 1:
The system performs preliminary authentication verification before allowing access. The physical authentication device verifies the user's identity and physical presence before granting remote access permissions, preventing attacks from trusted sources by verifying authentication credentials in advance rather than relying solely on firewall rules.
4Reliability
If remote access is restricted to prevent cyberattacks, then security is improved, but system maintenance and service capability deteriorates
Solution Approach 1:
The authentication system dynamically adjusts access permissions based on the verification of physical presence and biometric credentials. When a authorized user is verified, remote access is enabled for maintenance operations; when unverified access is attempted, access is blocked. This dynamic adjustment maintains security while enabling necessary maintenance capabilities.
Data Source
AI summary
A secure control system includes a network of multiplexers that control end/field devices of an infrastructure system, such as an electric power grid. The multiplexers have a default secure lockdown state that prevents remote access to data on the multiplexers and prevents modification of software or firmware of the multiplexer. One or more of the multiplexers include a physical authentication device that confirms the physical proximity of a trusted individual when remote access is requested. A user accesses the network and one of the multiplexers remotely by way of login credentials. The trusted individual confirms the identity of the remote user and operates the physical authentication device connected with and in proximity to that multiplexer, thereby confirming that the remote user can be trusted to access data and reconfigure the multiplexers. The multiplexer connected with the physical authentication device generates a token that is passed to each of the multiplexers that the remote user needs access to. The token may specify a time period, after which, the multiplexers will reenter secure lockdown mode.