In general; you don't. If the gov. wants to make you do something, you're going to have to do it. In many western countries, that's only a vague threat, an many others it's a lot more real.

Theoretically, you could have two components to the password: something long and random that is written down, and something easily remembered and personal. A special moment, a place, an anniversary only the two of you would know, etc.