Port Power-Gating Circuit for Secure Device Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Information handling systems (IHS) face challenges in securely managing input/output ports to prevent data loss and unauthorized access, as existing solutions struggle to distinguish between desirable and undesirable devices connected to these ports.
Innovation Solution
A port securing module is introduced, comprising a power gate, resistor, and operational amplifier, which monitors current draw to determine if a load is coupled to the port, activating the power gate only when an authorized device is present, ensuring adequate voltage supply while preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If port security restrictions are implemented to prevent unauthorized device access, then data security is improved, but port functionality and device compatibility deteriorate
Solution Approach 1:
The system performs preliminary identification of connected devices before granting full port access. The identification circuit detects device signatures or characteristics upon connection, and the controller pre-approves or blocks access based on this initial detection, preventing unauthorized devices from compromising data security while allowing legitimate devices to function normally
Solution Approach 2:
The system continuously monitors port connections through identification circuits that detect when devices are connected or disconnected. This feedback mechanism allows the controller to dynamically adjust port access permissions, blocking unauthorized devices while maintaining functionality for approved devices, thus resolving the contradiction between security and adaptability
2Use of energy by moving object
If power gating is used to control power supply to connected devices, then power consumption is reduced, but voltage stability for authorized devices deteriorates
Solution Approach 1:
The power gating mechanism applies different power control strategies to different devices connected to the port. Authorized devices receive stable, continuous power supply through the power gate, while unauthorized or disconnected devices have power completely blocked. This localized differentiation maintains voltage stability for legitimate devices while reducing overall power consumption by not supplying power to unauthorized devices
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively secures IHS ports by enabling secure boot processes, preventing unauthorized device usage, and maintaining adequate voltage for connected devices, thus enhancing data security and system integrity.
Implementation Method 1
a resistor coupled in parallel to the power gate, and an operational amplifier including an inverting input and a non-inverting input that couple the operational amplifier in parallel to each of the power gate and the resistor
Implementation Method 2
a power gate that is operable to be coupled in series to a first power source and to a load
Data Source
AI summary
A port securing module includes a power gate that is operable to be coupled in series to a power source and to a load. A resistor is coupled in parallel to the power gate. An operational amplifier includes an inverting input and a non-inverting input that couple the operational amplifier in parallel to each of the power gate and the resistor. The operational amplifier also includes an output that is operable to indicate whether a load is coupled to the power gate and, if a load is coupled to the power gate, supply a voltage to activate the power gate such that power is supplied to the load.