So every 12 hours you'd have to go find your non-memorized password? Sounds incredibly inconvenient.
Anyway, a tyrant is simply going to hold and gun to your head and tell you to go get that second password.
Anyway, a tyrant is simply going to hold and gun to your head and tell you to go get that second password.
I'm not that familiar with the US law system, but wouldn't a written down password be worse? With a memorized password it's at least possible to claim you have forgotten.
Some encryption schemes allow two keys for unlocking, but they would show different content depending on the key. I think I remember trying that on TrueCrypt many years ago.
It's not practical at all, but there should be possible to build systems that authenticate you only if you are free and doing that on your free will without any compulsion.