"possession of the password" ? What The Hell ?!
you quoted it yourself:
...or other items of physical evidence may be extracted from a defendant against his will...
...but I do not believe he can be compelled to reveal the combination to his wall safe - by word or deed...
Password is not an item, you can't "posses" it. Password is a fact you know. So, unless you already have Though Police, it's a complete rape of any idea of Justice and a false premise for any future discussion of where and how you should or shouldn't be forced to reveal it.
But, of course, you also have revealed hypocrisy of the judge in that case.
And "not acknowledging" "possession" of the password, seriously ? How do you "not acknowledge" this made-up "possession" of the password to your own hardware, huh ? I see only two options:
1) "not acknowledging" that this hardware you have in your home or office space is owned or issued by/for you. which you can either deny (which is a blatant lie with all its consequences) or play a "silence game" which will not be easy when they fucking you up emotionally and physically (cell is not proper environment for human being to live, obviously)
2) "not acknowledging" "possession" because there can't be such thing and therefore it's impossible for you to confirm or deny something that can't be
Option #1 is a complete demagogy and mind-fuckery, Option #2 is not accepted by self-righteous hypocrites-enforcers. But it should.
It's not an item to posses. That's it. It's where it should end.
And, people, stop trying to squeeze information-based concepts into matter-based analogies. Information is immaterial, it's maybe good enough to explain something to the person without any abstract thinking capabilities but it's not good enough to be a basis for assumptions, especially, life-crippling ones.