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Here is a shameless plug for my project. It is a esp32 based programmable keyboard with a web interface and api. It can be directly flashed to the m5stack atom or m5stack cardputer.

https://github.com/akoerner/kprox

Because the title and name are undescriptive af:

ToothPaste allows a user to transmit AES-256 encrypted keyboard and mouse commands to any USB-compatible device wirelessly, without the need for specialized drivers or extensive set-up using WEB-BLE, a Cryptographic IC and an ESP32-S3.

I love hardware projects like this, I've got a couple of things that I want to do, but then I realise I don't really know what I'm doing so I ask a LLM, but then I realise I don't know enough to know if it's actually correct or if it's just gonna fry the ESP!

Would this work with something like a TV or set-top box? Having to type in long passwords by hand is a pain, if I could just plug this in and copy/paste from the password manager on the PC that would be nice. (Admittedly its not a common issue, but its one of those "Aha I have something in the drawer for this")

Nice work! Hardware password managers are great! While yours does a little more, perhaps, these might also be interesting:

Mooltipass: https://www.themooltipass.com/

OnlyKey: https://onlykey.io/

I could use this to control an android phone I have at home, which is allowed to run a banking app, and which my on-the-go phone that runs GrapheneOS cannot thanks to Google's Play Integrity™.

How do you know that shady computer won't pwn your usb device?