Yes, it's impossible to disable the disk encryption on iOS. If you don't set a passcode, the disk is still encrypted (but only with a per device key), this prevents recovery of data after an erase.
I've been party to discussions like this, I know how it goes. Once you're shoved in a small room indefinitely, all of your possessions and shoes taken so you don't kill yourself, and had questions dumped on you, a lot of these cute actions people are suggesting are pretty ridiculous. A seriously stupid move would be to try something like erasing your data, or trying to mislead the offers would simple prolong the experience. You get that treatment even if you haven't done anything wrong, god knows what happens if you have.
I frequently see people with KitKat devices. Just because they aren't being sold by big parties now doesn't mean people don't have them, I can't make a global statement about Android devices the same I can about iOS ones.
The waiting line for immigration/customs is not the area I'm talking about, this area is where you go once you fail the initial screening. In some international airports like Sydney you will receive a $300 on the spot fine if you have your phone in your hand, they're serious about it.
All Apple devices are AES encrypted with a combination of a key on flash in the CPU, and a unique static key in the CPU core. "Erasing" the phone just removes the key, rendering the bulk flash storage completely useless. There's never any data stored which is not encrypted.
The area you are frog marched into is strictly no devices allowed, if they see you with any electronics in your hand you will be pounced upon. This is very obviously because people try to destroy evidence they have on their devices once they discover they are screwed.
Option 1, why did you bring decoys? You should probably sit here in this cell for a bit while we work out what the fuck you're doing.
Option 2, they can't stop you from entering but they can make you enter directly into a jail cell, or generally make your life miserable. See the owner of cock.li, who had all of his electronics seized twice.
We too have used Uberconference, I forget why we ditched that as well, might have been down to the cost of the thing. I actually quite liked it, the web application was solid and it encourages ad-hoc meetings.
I believe it's supposed to be only names you've gone under, calling yourself horsemaster88 on youtube wouldn't be included, but calling yourself Jerry Fink, lord of horses would be included. With the new laws going into place for giving up social media names I wouldn't be surprised if online pseudonyms will be included in the future though.
If they ask you "is there any hidden data on this device", you would have to respond in the affirmative. Lying to a border guard is a felony, there's no cute technical solution to this. They will, according to their own paperwork, make copies of any data they find interesting for future analysis.
The documentation that comes when you are compelled to give over keys mentions that they will retain complete copies of any disks, drives, flash card, any piece of data until it is no longer relevant (read, forever).
> To me having several pseudonyms and also using throwaways is part of standard information hygiene. I also have multiple email addresses, some are set to forward to others (one-way of course), others aren't. I don't know why people aren't teaching that to their children.
For aliens (people entering under ESTA, visas, etc), you are compelled to reveal any aliases or pseudonyms you operate under. There's a two page document for you to fill the details out under ESTA, presumably under under a visa as well. Lying to a border guard, or on these forms is a felony.
"Have you ever violated any law related to possessing, using or distributing illegal drugs?"
"Do you have a physical or mental disorder; or are you a drug abuser"
It's also on the customs forms for New Zealand, where you're asked along with questions about any drug paraphernalia you might be bringing in. They seem to be much more concerned about fruit than people slipping through with a bong though. Only country I've ever been set upon by fruit sniffing dogs.