Silicon Root-of-Trust Alert Handling for Adaptive Threat Escalation
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Solution Overview
Problem
Existing security circuitry in electronic devices is inflexible and unable to effectively combat a variety of software, hardware, and wireless attacks, including physical attacks that can compromise device security and user information.
Innovation Solution
Implementing adaptable and flexible security circuitry with an alert handler that communicates using an expansive protocol, allowing different circuit components to interact seamlessly and respond to security alerts with tailored process flows based on threat severity, including programmable escalation timers and countermeasures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing security circuitry is used, then device security is provided, but the security circuitry is inflexible and unable to effectively combat a variety of attacks
Solution Approach 1:
The security circuitry implements dynamic response escalation through programmable timers that allow the system to adapt its security measures based on the severity and persistence of detected threats. The escalation mechanism transitions from initial alert to intermediate countermeasures and finally to severe countermeasures, enabling flexible adaptation to varying attack scenarios while maintaining reliable protection.
Solution Approach 2:
The system changes operational parameters by implementing configurable escalation timers and selectable countermeasure sequences that can be adjusted based on threat assessment. The alert handler can modify response timing, severity levels, and countermeasure selection dynamically, allowing the security circuitry to adapt to different attack types while ensuring effective protection through parameter optimization.
2Adaptability or versatility
If security circuitry implements multiple escalation levels, then the ability to respond appropriately to different threat severities improves, but the device complexity increases
Solution Approach 1:
The security circuitry is segmented into distinct functional modules: an alert handler for threat detection, programmable escalation timers for timing control, and escalation handlers for executing countermeasures. This segmentation allows each component to perform its specific function independently, reducing overall system complexity while maintaining the ability to implement multiple escalation levels for different threat severities.
3Reliability
If existing antimalware programs are used, then software-based malware protection is provided, but protection against physical and wireless attacks is compromised
Solution Approach 1:
The security circuitry is designed with multi-functionality to detect and respond to various attack types including physical tampering, wireless attacks, and software-based malware. The alert handler can process different alert types from multiple sources, and the escalation mechanism can apply appropriate countermeasures regardless of attack vector, providing universal protection across software, hardware, and wireless domains while maintaining reliable malware protection.
Data Source
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AI summary
An IC chip can provide silicon root of trust (RoT) functionality. In described implementations, the IC chip includes a processor, an alert handler (110), and multiple peripheral devices (250), which generate alert indications (352). The alert handler processes the alert indications, which have security implications. The alert handler includes multiple alert receiver modules (312) to communicate with the multiple peripheral devices. The alert handler also includes a controller (310), multiple accumulation units (306), multiple escalation timers (308), and multiple escalation sender modules (314). These components can be organized into a hierarchy of increasing escalation severity. In operation, the controller classifies an alert and flexibly implements an adaptable alert handler path that is established through the escalation components responsive to the classification and based on a source of the alert. A path can conclude with an escalation sender module commanding an escalation handler (350) to implement a security countermeasure. The flexible paths can therefore handle different types of alerts.