Chassis-Open Detection for Electronic Device Boot Security
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Solution Overview
Problem
Users face difficulty in determining if an electronic device has been disassembled and tampered with, leading to potential data breaches.
Innovation Solution
An electronic device equipped with a chassis open detector, security chip, and controller that generates a warning signal upon chassis opening, modifies authentication data, and verifies it during the boot process to prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device uses traditional security measures without chassis monitoring, then the device structure remains simple and easy to manufacture, but the security against tampering is insufficient
Solution Approach 1:
The chassis open detector is pre-configured to monitor chassis integrity before tampering occurs. The detector continuously checks the physical state of the chassis and is ready to trigger security responses immediately upon detecting opening events, preventing data breaches before they can happen.
Solution Approach 2:
The patent introduces a chassis open detector as an intermediary component between the physical chassis and the security system. This detector acts as a mediator that translates physical chassis states into electrical signals that can be processed by the controller, enabling security monitoring without significantly complicating the overall device structure.
2Reliability
If the device implements authentication verification during boot process, then data security is improved, but the boot process time increases
Solution Approach 1:
The authentication data is pre-loaded into the controller before the boot process begins. The controller retrieves this authentication data during the early boot phase and performs verification against the first code stored in memory. By preparing authentication data in advance and integrating verification into the existing boot sequence, the patent minimizes additional time overhead while ensuring data security.
3Reliability
If the security chip modifies authentication data upon chassis opening detection, then security response capability is enhanced, but the complexity of the security chip increases
Solution Approach 1:
The security chip is designed to autonomously modify authentication data when it receives the second code from the controller indicating chassis opening. The chip independently performs the modification operation without requiring external intervention or complex control circuits, thereby enhancing security response capability while keeping the chip structure relatively simple.
Data Source
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AI summary
An electronic device includes a chassis, a chassis open detector, a security chip and a controller. The chassis open detector is disposed in the chassis and is configured to generate a warning signal in response to the chassis being opened. The security chip is configured to store authentication data, which includes a first code in an initial state, and is configured to modify the content of the authentication data in response to receiving the warning signal from the chassis opening detector. During a boot process of the electronic device, the controller is configured to receive the authentication data and determine whether the authentication data is consistent with the first code. When the authentication data is consistent with the first code, the controller allows the boot process to proceed. Otherwise, the controller causes the boot process to pause or terminate.