WorldDev
Re:iOS: Apps persist data after full deletion
on Saturday January 03, 2026 @01:25PM (#46479850)
Yes, I think that's right, you've found the root of the issue. Thanks for that link. Not great, I expected better from Apple.
Re:iOS: Apps persist data after full deletion
on Saturday January 03, 2026 @04:48AM (#46474686)
Right, but I deleted the app and all its data. I made sure there was no other app from the same vendor left on the device.
I checked the "Passwords" and there was no entry for these apps (I think that's the only place for the keychain on ios?).
And it's not about the phone telling its phone number.
Re:iOS: Apps persist data after full deletion
on Saturday January 03, 2026 @04:45AM (#46474669)
I tried that, and it still has access to account username on reinstall.
Re:iOS: Apps persist data after full deletion
on Saturday January 03, 2026 @04:44AM (#46474657)
No, I made sure I had only instagram installed and no other app from the same vendor.
iOS: Apps persist data after full deletion
I noticed that apps retain info after being deleted. That means we are tracked by the app even after we deleted it.For example, if I delete whatsapp or instagram, choosing to delete all data, then restart the phone and reinstall the app, it will automatically know my account.So there is clearly a persistence mechanism that it uses.I tried to understand which one.- UIDevice.identifierForVendor ...
Re:Ask HN: What AI tool to use for coding in 2025?
on Wednesday November 26, 2025 @02:59AM (#46055189)
Got it, thanks
Re:Ask HN: What AI tool to use for coding in 2025?
on Tuesday November 25, 2025 @02:51PM (#46049914)
Interesting, thank you. Did you compare it to other methods and found it better?
Ask HN: What AI tool to use for coding in 2025?
I feel I am a bit late to the AI party. If I'm honest, I was reluctant to take the plunge, because I love coding so much.But lately I have taken more and more to ask ChatGPT 5.1-Thinking for code, and I have to reluctantly admit that it spits out useful code. And yes, much much faster than me.So I feel I now need to use a proper AI assistant to assist in coding.At that point, I am mainly...
Re:Ask HN: Security of Hardware Nano KVM
on Thursday October 30, 2025 @11:41AM (#45761269)
That makes sense, thanks!
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Tuesday October 28, 2025 @11:20AM (#45734029)
Thanks for the idea. I think it's a great one, but I have a few concerns:
1) The two computers are on 2 different grounds, so I believe it could damage the computers. So I would like to isolate the ground somehow, I am not sure what the options are. I tried to look for opto-isolated options, but didn't really find something clear. Do you have any suggestion?
2) This specific chip is marked NRND (not recommended for new designs) on ftdi's website, So it feels slightly wrong to use it?
Re:Ask HN: Control 2 air-gapped computers with 1 mouse and keyboard
on Monday October 27, 2025 @11:45AM (#45722302)
I see, you are unplugging and re-plugging, instead of just pressing a button. That makes sense. It feels like a usb mechanical switch should exist, but I guess it does not.
Another option that I looked at is whether I could use the switching capability on the device itself. For example the new Logitech MX 4 can switch between different computers. It also has a wireless connection, versus bluetooth connection. Do you have a sense whether switching with a device like that is enough of a separation?
Re:Ask HN: Control 2 air-gapped computers with 1 mouse and keyboard
on Monday October 27, 2025 @09:10AM (#45720646)
That's interesting, thanks for sharing.
> Modern peripherals may have local storage
Do you mean the flash that contains the code for the microcontroller?
> I have a dumb USB switch
I am not 100% sure I understood. Is the "dumb USB switch" the paperclip?
Ask HN: Control 2 air-gapped computers with 1 mouse and keyboard
Hi all, I am trying to control 2 computers that are air-gapped, with 1 mouse and keyboard.Using any standard usb switch or KVM breaks the air-gap, as malware can (and has been known to) spread via kvm and USB switches.Here are the solutions I am exploring:- Use a mouse and keyboard via bluetooth, using the switch inside the device to switch computer. For example the logitech MX mouse can switch...
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Sunday October 26, 2025 @05:09AM (#45710235)
No problem at all, I didn't interpret it as sarcastic.
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @05:32PM (#45707161)
Well, nothing malicious, and it would be to use between 2 of my own computers.
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @05:31PM (#45707154)
Thanks for your thoughts. That all sound fair.
I am fine with having quite a bit of configuration on the target device (I am fine with configuration on both sides).
> it ought be possible to make a rpi0 device that outputs a usb-gadget keyboard
I like very much the idea of being able to make the host side (macBook) appear as a usb-gadget keyboard. That way I would just need to plug a single usb cable between the 2 computers. Could you give me a few pointers to get started, to do this on macOS?
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @05:15PM (#45707026)
Thanks for that, that's an interesting thought. I am trying to think about the security aspect. If the receiving device (mac mini) is infected with malware, can it infect the macBook through the serial port?
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @05:03PM (#45706936)
That's absolutely fair, and I am fine with writing software for both computers. However, I need this software to not go via the network at all.
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @05:01PM (#45706928)
To try and clarify a bit: I am essentially trying to have a KM (KVM without the V) over USB.
To go one step higher, I am trying to control a mac mini from the keyboard of a macBook.
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @04:55PM (#45706891)
Thanks, but I want to avoid IP. I want a system that does not go via the network at all.
Re:Ask HN: Advice for creating a USB device linking 2 computers
on Saturday October 25, 2025 @03:53PM (#45706500)
Thanks for your thoughts. I agree that using software would be easier, but I wanted to do it in hardware in this specific case.
I am unfamiliar with Raspberry pi, but if my understanding is correct, it's running a real os. So I would need to send it a command to actually shut down every time I want to remove the usb device. More generally, having a general purpose OS on the little device seems overkill for that use case, no?
Ask HN: Advice for creating a USB device linking 2 computers
I want to build a little device that connects two computers together via usb, and send keystrokes from one to the other.(I would use it to use a laptop keyboard on a headless computers).I am looking for an easy solution, it does not have to be the cheapest.ChatGPT points me to Arduino, but as far as I can see, there's no arduino with 2 usb ports. It also points me to Raspery pi zero, but that's...
Ask HN: Security of Hardware Nano KVM
Hi all, I am looking at this product: [Sipeed NanoKVM-USB](https://wiki.sipeed.com/hardware/en/kvm/NanoKVM_USB/development.html).It would work very well for my need, but the company has a [terrible track-record for security](https://www.youtube.com/watch?v=plJGZQ35Q6I).So I am trying to approach it from a fully paranoid perspective. Can I use this device and protect myself fully from it?They...
Re:Ask HN: Hardware to use MacBook keyboard and trackpad to control Ma...
on Friday October 24, 2025 @11:56AM (#45695913)
Understood, thanks for your thoughts!
Re:Ask HN: Hardware to use MacBook keyboard and trackpad to control Ma...
on Thursday October 23, 2025 @10:46AM (#45682442)
Interesting, I don't know these.
I assume you have a little software on the controlling computer that sends keystrokes over the network, they are received by this device, and sent via usb to the controller computer, simulating a usb keyboard?
Do you have experience with it? How is the latency? Does it work with the macbook trackpad?
Re:Ask HN: Hardware to use MacBook keyboard and trackpad to control Ma...
on Thursday October 23, 2025 @09:43AM (#45681732)
Thanks for the pointers. The two devices are in 2 distinct security perimeters. So I was hoping to avoid software that link the two. I don't know if malware could use these software to propagate from one of the device to the other.
Ask HN: Hardware to use MacBook keyboard and trackpad to control Mac mini
Does anyone know of a hardware solution, like a mini KVM/USB switch, that uses directly the integrated keyboard and trackpad of a mac book, to control a mac mini?Basically I'd like a KVM set up, but without the need for an external keyboard and trackpad.
Ask HN: How to Buy a Secure Printer?
I am trying to understand the practical risks posed by printers connected to the network.I understand that I don't want the printer to be exposed to the internet.But is it safe when the printer is only in the local network?Is there such a thing as a bluetooth only printer, to avoid having to connect it to the wifi?Any other security consideration when buying a printer?Thanks!
Re:Ask HN: How do GPS tracking devices send signal
on Tuesday September 10, 2024 @12:13PM (#41502366)
Ah, that makes sense. Thanks for the explanation.