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Nice! I initially wanted to build a similar device using just an ATtiny85 that speaks USB using USBtiny [1] or V-USB [2]. It would be low-cost but also not secu
by zxcvgm 10y ago
Nice! I initially wanted to build a similar device using just an ATtiny85 that speaks USB using USBtiny [1] or V-USB [2]. It would be low-cost but also not secure. Using a crypto processor like the ATECC508A is obviously a saner choice.
[1] http://dicks.home.xs4all.nl/avr/usbtiny/ http://dicks.home.xs4all.nl/avr/usbtiny/
[2] https://www.obdev.at/products/vusb/index.html https://www.obdev.at/products/vusb/index.html
- conorpp 10y agoAs the ATECC508A is just an I2C peripheral you still have a broad choice for microcontrollers (as you still need a U2F program and U2F). I choose to use a EFMUB1 from silicon labs.