Testing the security of a device?
Description
A user on Reddit's r/cybersecurity subreddit describes a custom hardware device built with a Raspberry Pi Pico and fingerprint sensor that outputs passwords as an HID device. The device employs encrypted password storage, signed firmware with secure boot, and fused read-only keys and debug ports to enhance security. The user seeks external analysis of the firmware repository for potential vulnerabilities, mentioning that the firmware was developed with assistance from an AI tool (claude.ai). No specific vulnerabilities or exploits are reported.
Reddit Discussion
I don't know if this is the right place to start, so please redirect me if I am out of line here...
I have created a hardware device, basically a raspberry pi pico with a fingerprint sensor: when placing a finger on the sensor, it writes out a password as an HID device. The passwords are stored encrypted on the pico, the firmware is signed, it uses secureboot, so only my firmware can run due to a locked key in the OTP storage, which is fused to be read-only. The debug port is fused shut as well. For my needs (entering several passwords many times daily) it is sufficient and rather secure. But I like to have this confirmed.
The firmware is on github. Does anyone know of a service which can analyse the repo and tell me of vulnerabilites? I used claude.ai to create the firmware, but it went through many iterations until everything worked as I intended.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The post details a custom-built hardware password entry device using a Raspberry Pi Pico with a fingerprint sensor. Security features include encrypted password storage, signed firmware with secure boot enforced by a locked key in OTP storage, and a fused debug port to prevent unauthorized access. The firmware source code is publicly available on GitHub, and the user requests a service to analyze the repository for vulnerabilities. No technical details or known vulnerabilities are provided, and no active exploits are reported.
Potential Impact
No direct impact or vulnerability is described. The device appears to implement multiple security controls to protect firmware integrity and password confidentiality. Without identified vulnerabilities or exploits, there is no immediate security impact.
Defensive Guidance
No mitigation actions are applicable as no vulnerabilities have been identified. The user is seeking vulnerability analysis services to confirm the security posture of their device firmware.
Technical Details
- Source Type
- Subreddit
- cybersecurity
- Reddit Score
- 0
- Discussion Level
- minimal
- Content Source
- reddit_link_post
- Post Type
- link
- Newsworthiness Assessment
- {"score":27,"reasons":["external_link","established_author","very_recent"],"isNewsworthy":true}
- Has External Source
- true
- Trusted Domain
- false
Threat ID: 6ad626aa2cdf04f6565e2bfd
Added to database: 10/19/2026, 14:18:18 UTC
Last enriched: 10/19/2026, 14:18:21 UTC
Last updated: 10/19/2026, 17:18:18 UTC
Views: 8
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