[squarefoot]

I don't like how it's engineered: the uC is completely overkill as the high voltage could be generated by a single transistor switcher that charges a capacitor, not unlike those "Joule thief" circuits used to light higher voltage leds with small batteries. The mosfet would then just switch that voltage, which could well be tens of volts or more. However, the working principle assumes the user's skin would be normally high, which is not the case if he/she is sweating since sweat would lower the skin resistance even more so because of sweat higher sodium content.

[kazinator]

Why not use the uC to implement a secret compartment on the drive instead? Like switch between two flash chips.

When the cops plug in the drive, they see the content you want them to see. And there are no hidden partitions or anything: your uC passes through all signals to a complete storage device. They can examine the partitions at the block level, and all that; nothing is hidden.

You have some mechanism to instruct the uC to switch different storage device (which, of course, is encrypted so that it's protected should it be discovered).

[amelius]

I don't like the initial assumptions: that a cop would never have wet fingers, or that you'd never miss the contacts or have partially dry fingers when plugging it in.

[amelius]

I would like to have seen something that triggers when the user says "by all means, have a look; I have nothing to hide".