I want deniability. After watching the videos from Ukraine of Russians pulling out citizens from cars forcing them to unlock their phone with guns to their heads -- I want a way to hand someone a phone, unlock it, and STILL be protected. I want my private things in a volume with deniability. Trucrypt was close.
I would pay a good premium for an iPhone with a distress code that unlocks the phone into an environment with some fake but plausible contents. Bonus points if it optionally wipes the real user partition upon entering the code.
That sort of exists, but only sort of. If you press the lock button on the side of the iPhone five consecutive times, it will then require your passcode to unlock (hopefully a high entropy passphrase), and will disable biometric authentication until unlocked with a passcode. You can set the phone to wipe after 10 failed attempts to unlock.
You can also say "Hey Siri, whose phone is this?" and your phone will lock down the same way as described above.
Of course, this doesn't protect from the $5 wrench attack, but plausible deniability only goes so far as well in a targeted attack. At least, depending on your local laws, law enforcement may not be able to compel you to provide your passphrase, but they can easily force you to use your biometric data, so this protects against that.
