Apple quietly introduced code into iOS 18.1 which reboots the device if it has not been unlocked for a period of time, reverting it to a state which improves the security of iPhones overall and is making it harder for police to break into the devices, according to multiple iPhone security experts.
On Thursday, 404 Media reported that law enforcement officials were freaking out that iPhones which had been stored for examination were mysteriously rebooting themselves. At the time the cause was unclear, with the officials only able to speculate why they were being locked out of the devices. Now a day later, the potential reason why is coming into view.
“Apple indeed added a feature called ‘inactivity reboot’ in iOS 18.1.,” Dr.-Ing. Jiska Classen, a research group leader at the Hasso Plattner Institute, tweeted after 404 Media published on Thursday along with screenshots that they presented as the relevant pieces of code.
There is no shortage of reasons to dislike Apple. This isn’t one of them.
I feel that a lot of the hate for Apple is not fully warranted. Contrary to Google or Facebook, their business model is not built on collecting your personal data. They are extremely overpriced, but deliver good quality - I am using my first iPhone for more than 4 years now, I never had and Android last nearly that long.
There is a scene in Mr Robot where Darlene is able to do a full wipe on her phone without even looking at the screen.
I wish I was that good.
I want a way that I can trigger this from the main lock screen without unlocking the phone.
Like a specific pin you have to enter twice to trigger the full wipe.
GrapheneOS has this. I believe it’s called a Duress PIN.
As a member of the intelligence community, I can almost guarantee that this is directed at the increased use of Cellebrite UFED hardware, specifically putting the device back into BFU mode, which removes cryptography-related memory allocations. This is also why you’re asked for your password instead of face or fingerprint upon reboot.
I don’t know how Cellebrite is a legally operating company. Their entire business model is a violation of the computer fraud and abuse act.
Cellebrite is developed in Israel, a country that legally shouldn’t even exist, and is known for genocide, crime, espionage, manipulation and propaganda, more war crimes, illegal settlements, using their intelligence agency to assassinate political opponents abroad, etc.
The so-called “only democracy in the middle east”
Law enforcement shouldn’t be able to get into someone’s mobile phone without a warrant anyway. All this change does is frustrate attempts by police to evade going through the proper legal procedures and abridging the rights of the accused.
Yep! The police, being fascists, HATE this.
They usually do have a warrant or it was seized lawfully.
This is about keeping them out even when it’s lawful.
Lawyer. Not true.
Example: An officer pulls someone over and suspects them of something arrestable. Then says “Do you want me to get your personal belongings from your car?”
Any person agreeing to this allows them to hold your phone as evidence indefinitely in the US now.
well it’s kind of a selling point. I’m just too used to using android, though.
Edit - there’s something for that too, cool!
You can enable lockdown mode. It forces the next unlock to ignore biometrics and require a pin, which police cannot force you to divulge without a warrant. Once enabled, you get a “lockdown mode” option in the menu when you hold down your power button.
If you haven’t done this and need the same ability IMMEDIATELY: reboot, or just shut down
Every first boot requires pin same as lockdown
Also: set a nonstandard finger in a weird way as your finger unlock if you wanna use that, then theyre likely to fail to get that to work should you not manage to lock it down beforehand
Finally: there are apps that let you use alternate codes/finger unlocks to wipe/encrypt/reboot the device instead, allowing you to pretend to cooperate with the cops up until they realize they got played
IANAL, but I’d be very careful about wiping the phone like that. Sounds a lot like destruction of evidence…
Gotta prove there was evidence on the phone in the first place, which would take forensic work to do and be not worth the work in the majority of cases
Plus it would annoy them, and that’s the real goal here
It’s not destruction of evidence though because without a warrant the information on the phone isn’t evidence, it’s just stuff on a phone. Stuff which is your stuff and you have every right to delete it whenever you want.
They would actually have to arrest you and acquire a warrant, try it to getting you to unlock the phone for it to be “evidence”.
The police would have a very hard time in court saying that there was evidence on the phone when they can’t produce any documentation to indicate they had any reason to believe this to be the case. Think about the exchange with the judge.
“Your honor this individual wiped their phone, thus destroying evidence”
“Very well, may I see the warrant?”
“Yeah… Er… Well about that…”
It doesn’t matter what the police may think you have done, if they don’t go via the process the case will be dismissed on a technicality. They hate doing that but they don’t really have a choice.
So many words to explain how you literally have no clue about how the law works.
How long until it reboots when inactive?
Why does rebooting it improve the safety or security of the phone?
When you first boot up a device, most data on that device is encrypted. This is the Before First Unlock (BFU) state. In order to access any of that data, someone must enter the passcode. The Secure Enclave uses it to recreate the decryption keys that allow the device to access that encrypted data. Biometrics like Face ID and Touch ID won’t work: they can’t be used to recreate the encryption keys.
Once you unlock the device by entering the passcode the device generates the encryption keys and uses them to access the data. It keeps those keys in memory. If it didn’t, you’d have to enter your passcode over and over again in order to keep using your device. This is After First Unlock (AFU) state.
When you’re in AFU state and you lock your device, it doesn’t throw away the encryption keys. It just doesn’t permit you to access your device. This is when you can use biometrics to unlock it.
In some jurisdictions a judge can legally force someone to enter biometrics, but can’t force them give up their passcode. This legal distinction in the USA is that giving a passcode is “testimonial” because it requires giving over the contents of your mind, and forcing suspects to do that is not legal in the USA. Biometrics aren’t testimonial, and so someone can be forced to use them, similar to how arrested people are forced to give fingerprints.
Of course, in practical terms this is a meaningless distinction because both biometrics and a passcode can grant access to nearly all data on a device. So one interesting thing about BFU vs AFU is that BFU makes this legal hair-splitting moot: biometrics don’t work in BFU state.
But that’s not what the 404 Media articles are about. It’s more about the forensic tools that can sometimes extract data even from a locked device. A device in AFU state has lots of opportunities for attack compared to BFU. The encryption keys exist, some data is already decrypted in memory, the lightning port is active, it will connect to Wi-Fi networks, and so on. This constitutes a lot of attack surface that hackers could potentially exploit to pull data off the device. In BFU state, there’s very little data available and almost no attack surface. Automatically returning a device to BFU state improves resistance to hacking.
Fun fact: in Australia we don’t have a bill of rights of any kind, so the cops can just force you to reveal your passwords. The maximum penalty for refusing is 2 years imprisonment.
Umm I forgot.
To the ASIO agent assigned to tracking my every online move:
- I didn’t see this comment.
- I don’t understand it.
- I would never do such a thing.
- I’m sorry this is what your life has been reduced to. Your patriotism is misplaced and you would be happier if you worked against the creeping surveillance state rather than for it. You know better than any of us how horrible it is, and you have the skills we need.
GrapheneOS also has this. Not sure stock android includes it.
It does, labled “Auto Restart”, but only when “preformance issues detected” or time specified. Apple is quite late on this feature.
on GrapheneOS it is labeled auto reboot and it specifically says “automatically reboot device if it hasn’t been unlocked in xxx hours” with a default of 18.
Wouldn’t that disrupt the usage of a phone as a server?
A phone server that is disconnected from cellular is already broken anyways.
