What happens to a text message when you destroy a cell phone?

Discussion in 'iPhone' started by Adair Bordon, Jan 28, 2015.

  1. Adair Bordon

    Adair Bordon Guest

    Adair Bordon, Jan 29, 2015
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  2. Adair Bordon

    Your Name Guest

    The particles on a hard drive retain some of the previous charges, so
    data erased with a single pass could potentially still be read (with a
    lot of effort and expense). For example, a particle that is written as
    a 0 twice hold a slightly different charge to a particle written as a 1
    and then a 0.

    That's why multi-pass wipes were invented - the more passes you do, the
    less difference there is between particle charges.
    Your Name, Jan 29, 2015
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  3. Adair Bordon

    Your Name Guest

    TXT messages are small and easily stored ... just like Usenet (ignoring
    binary newsgroups).

    PXT and video messages would be a little more of a problem, but even
    those, by design, aren't huge.

    Storing them isn't invasion of privacy (in some places it a legal
    necessity). Reading them would be, with the exception of legal
    authority request.

    Storing them in a similar way to emails could also be handy if you lose
    your phone - just get a new one and it still has the same stored
    messages available.
    Your Name, Jan 29, 2015
  4. Adair Bordon

    Your Name Guest

    Apple iPhones and iPads for example can be remotely wiped if they are
    lost / stolen. Of course the device does need to be connected to a
    network for the "wipe" signal to get through.

    If selling, giving away, or throwing away the device, then you can
    manually wipe and reset it to factory settings.
    Your Name, Jan 29, 2015
  5. Adair Bordon

    Your Name Guest

    An know-nothing idiot implied it did, but it doesn't.

    To send encrypted messages you and the receiver need to use the same
    third-party messaging app instead of the phone's standard SMS.
    Your Name, Jan 29, 2015
  6. Adair Bordon

    DevilsPGD Guest

    SMS/MMS doesn't have any native support for encryption, true. However,
    if I were to ROT13 a message before sending it, and you know to ROT13
    the same message, we'd be able to communicate while an especially stupid
    observer would be unable to understand the contents of the message.

    Now swap out ROT13 for strong encryption using keys we exchanged
    manually, outside of SMS, and you're good to go.

    SMS is just a transport mechanism for carrying plain-text, anything that
    can be encoded into plain-text can be transmitted via SMS.

    However, in practical terms, most encrypted chat applications don't use
    SMS as the delivery mechanism simply because it's easier to implement
    your own transport mechanism that is well suited to the larges messages
    that usually result from encryption, along with handling the
    complexities of key exchange and handshaking.

    So while encrypted SMS isn't really a thing in the modern world, there's
    no technical reason you couldn't implement it, if you wanted. I know of
    one company that dabbled with a commercial implementation, although they
    ended up going a different direction before the product was released to
    the public.
    DevilsPGD, Jan 29, 2015
  7. Adair Bordon

    DevilsPGD Guest

    On the iPhone, it's controlled by the "Erase All Content and Settings"
    action, it takes about 30 seconds to destroy the encryption key and
    generate a new one, taking you to the new-iPhone setup screen.

    Be aware that there may be backups, Apple is capable of decrypting
    iCloud backups (don't believe me? Wipe your device, do a password reset
    on your account, then restore a backup. Now think about what stops Apple
    from performing similar steps without involving you). iTunes backups can
    be encrypted, but this encryption is not well documented (at least to my
    knowledge), so you may or may not be able to trust this. I'd recommend
    using full disk encryption, or foregoing backups entirely, if security
    is worth more than convenience to you.

    (And again, most of this is too much of a pain for a common user -- This
    is very true. But if you're in a situation where your future freedom or
    livelihood is dependant on your data privacy, it's a small price to pay)
    DevilsPGD, Jan 29, 2015
  8. Adair Bordon

    Lewis Guest

    Well, they would never lie about that, obviously.
    Logging in would not be in any way relevant.
    Maybe carriers have changed. They certainly used to keep text messages.

    Lewis, Jan 29, 2015
  9. Adair Bordon

    Lewis Guest

    Someone is wrong.
    Lewis, Jan 29, 2015
  10. Adair Bordon

    Lewis Guest

    That's going to be tricky in 160 characters.
    Lewis, Jan 29, 2015
  11. Adair Bordon

    Rod Speed Guest

    He wasn’t talking about SMS.
    Rod Speed, Jan 29, 2015
  12. Adair Bordon

    john james Guest

    There is no reason why the number of characters involved needs to change.
    john james, Jan 29, 2015
  13. Adair Bordon

    Guest Guest

    Guest, Jan 29, 2015
  14. Adair Bordon

    Guest Guest

    if someone is the target of a criminal investigation, their phone *and*
    computer will be seized and the cops will be looking for text messages
    and a whole lot more, plus, once they have the computer they now have
    access to the phone.
    Guest, Jan 29, 2015
  15. Adair Bordon

    Your Name Guest

    But then you'll need either another app to decode / encode messages, or
    spend time doing so manually. The receiving person also needs to know
    what encoding scheme / key you've used - you could send a second TXT
    saying "I'm using ROT13", but it kind of defeats the purpose. ;-)

    Of course if you're going through a third-party server / messaging
    system, there's an potential risk (for the tin-foil hat wearers and
    conspiracy "they're spying on me" nutters) that they could well have a
    "backdoor" code that enables them to read the messages anyway.
    Your Name, Jan 29, 2015
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