Authentication Module for Network Device Power Supply Security
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Solution Overview
Problem
Network devices in systems monitored by a host device are susceptible to unauthorized replacement with counterfeit or clone devices, leading to potential transmission of false data, which can adversely affect the operation of systems such as manufacturing or automotive systems.
Innovation Solution
Integration of a power supply module with an authentication module in network devices, which generates and stores a unique signature or key, and communicates with the host device to authenticate the network devices, ensuring only authorized devices operate by sending a digital signature or authentication code and shutting off unauthorized devices if validation fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network devices are allowed to operate without authentication, then system operation is simple and fast, but unauthorized devices can transmit false data and adversely affect system operations
Solution Approach 1:
The authentication module performs verification in advance before allowing the network device to operate. The host device sends an authentication request signal, the authentication module generates a response signal with digital signature, and only after successful verification does the voltage regulator enable power supply to operational components. This preliminary authentication prevents unauthorized devices from affecting system operations.
Solution Approach 2:
The authentication module acts as an intermediary between the host device and the voltage regulator. It receives authentication requests from the host, verifies credentials, and controls the voltage regulator's power supply based on verification results. This intermediary mechanism enables reliable authentication without requiring direct complex interaction between the host and all system components.
2Reliability
If authentication verification is performed for all network devices, then unauthorized devices are blocked, but system operation time increases due to verification processes
Solution Approach 1:
Authentication is performed as a preliminary step before device operation begins. The voltage regulator is configured to prevent operation of network device components until authentication is complete. This ensures that while authentication time is incurred, unauthorized devices cannot operate long enough to cause harm, and legitimate devices experience authentication only once at startup.
3Reliability
If the voltage regulator supplies power to all components continuously, then device operation is uninterrupted, but unauthorized devices can affect system operations
Solution Approach 1:
The voltage regulator is configured to supply power to components only after successful authentication. Upon receiving an authentication request signal, the authentication module verifies credentials and only then enables the voltage regulator to supply power to operational components. This preliminary power control ensures security without requiring continuous intervention during normal operation of authenticated devices.
Solution Approach 2:
The authentication module and voltage regulator work together in an automated self-service manner. The authentication module automatically generates response signals and controls power supply based on verification results, while the voltage regulator automatically enables or disables power to components based on authentication status. This eliminates the need for manual security management and maintains ease of operation for authorized devices.
Data Source
AI summary
A power supply module implemented within a first device and including a voltage regulator and an authentication module. The voltage regulator receives power from a power source and supplies the power to devices within the first device. The power source is separate from the power supply module. The authentication module includes a regulator module and a generation module. The regulator module controls operation of the voltage regulator based on operation in one of multiple operating modes. The generation module: receives an authentication request signal from a host device; in response to the authentication request signal, transmits an authentication response signal to the host device; and receives a notification signal from the host device based on the authentication response signal. The notification signal indicates whether the power supply module is an authorized device. The regulator module is configured to transition between the operating modes based on the notification signal.