Bio-firewall for Medical Device Non-networked I/O Security
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Solution Overview
Problem
Medical devices such as pacemakers and implantable cardio defibrillators are vulnerable to cyberattacks due to the lack of protection for non-networked input/output operations, which can lead to malicious commands affecting patient health.
Innovation Solution
Implementing a bio-firewall system that uses rule-based filtering to monitor and block malicious network commands by determining if they fall outside safe operating parameters, and alerting medical professionals or patients of potential cyber threats, either in hardware or software form, specifically at the firmware or kernel level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional firewall techniques are used for networked communication, then network security is improved, but non-networked I/O remains unprotected and vulnerable to cyberattacks
Solution Approach 1:
The patent divides the communication interface into two separate segments: a networked communication interface for wireless/wired network communication and a non-networked communication interface for direct communication with external devices. This segmentation allows traditional firewalls to protect networked communication while a separate bio-firewall protects non-networked communication, preventing cyberattacks from exploiting unprotected I/O pathways.
Solution Approach 2:
The patent introduces a bio-firewall as an intermediary component that sits between the non-networked communication interface and the device controller. This intermediary monitors and filters commands from non-networked sources, blocking malicious commands while allowing legitimate ones to pass through, thus protecting the medical device from cyberattacks without interfering with normal operation.
2Object-affected harmful factors
If a bio-firewall is implemented to protect against cyberattacks, then patient safety is improved, but device complexity increases
Solution Approach 1:
The bio-firewall is designed to perform multiple functions within a single component: it monitors commands from non-networked sources, determines whether they are malicious based on predefined criteria, blocks suspicious commands, and logs events for analysis. This multi-functionality reduces the need for separate protection mechanisms and minimizes overall system complexity.
Solution Approach 2:
The system performs preliminary actions by establishing a bio-firewall before cyberattacks can occur. The bio-firewall is pre-configured with security criteria and monitoring rules that automatically evaluate incoming commands, preventing malicious actions before they can affect patient safety or device operation.
3Difficulty of detecting and measuring
If comprehensive monitoring of non-networked I/O is implemented, then detection of malicious commands is improved, but processing overhead increases
Solution Approach 1:
The bio-firewall implements partial monitoring by focusing only on critical commands and parameters that pose security risks, rather than monitoring all I/O operations equally. It applies security criteria selectively to high-risk communication pathways and command types, reducing processing overhead while maintaining effective detection of malicious commands.
Solution Approach 2:
The system incorporates feedback mechanisms where the bio-firewall continuously monitors command patterns, learns from blocked malicious commands, and adjusts its monitoring strategy accordingly. This feedback loop improves detection accuracy over time while optimizing energy usage by focusing monitoring resources on the most relevant security threats.
Data Source
AI summary
A system for providing a bio-firewall for a medical device. The system includes a bio-firewall electronic processor configured to receive a processed network command from a device electronic processor. The bio-firewall electronic processor is also configured to determine whether the processed network command is associated with a cyberattack based on at least one rule. The bio-firewall electronic processor is also configured to, in response to determining that the processed network command is not associated with the cyberattack, enable transmission, via a non-networked communication interface, of the processed network command to a non-networked component. The bio-firewall electronic processor is also configured to, in response to determining that the processed network command is associated with a cyberattack, prevent transmission, via the non-networked communication interface, of the processed network command to the non-networked component.