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Thread: what does it mean when "apple stops signing"

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i see it all over the place but i don't know what it means and cannot find a post giving a good explanation of it.
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  1. #1
    Green Apple
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    Default what does it mean when "apple stops signing"
    i see it all over the place but i don't know what it means and cannot find a post giving a good explanation of it.

  2. #2
    Super Moderator Cer0's Avatar
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    Not news so moved to better place.

    3GS and iPhone 4 need to have the firmware signed to install. So in order to downgrade you have to get the firmware signed. But Apple is fighting this by stopp signing a firmware when a new one is released. Example is today: 4.0.1 is released so they are going to stop signing 4.0. Meaning that you can't go back to 4.0 if you go to 4.0.1 on a 3GS or iPhone 4.

  3. #3
    Green Apple
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    thanks for moving...i am still not following on what it means by signing...

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    Super Moderator Cer0's Avatar
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    The hardware on the 3GS and iPhone 4 need "keys" to install any firmware. That is what is being signed. Apple is giving the current firmware the "keys" to access the hardware to install. But older firmware cannot get said "keys" because Apple stopped "handing" those out for that firmware.

  5. #5
    Green Apple
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    you nailed it...i now get it...i used to mod dish cards so makes sense now

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    plain jane vanilla (post count restored to FULL AWESOMENESS) cpjr's Avatar
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    To be literal, Apple has to say "ok" to any firmware install on your phone, if their servers dont say ok, it wont install.

    When they stop signing the firmware....it means they stop saying ok.

  7. #7
    Green Apple
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    so if you do the umbrella backup the "ok" is stored in the backup?

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    plain jane vanilla (post count restored to FULL AWESOMENESS) cpjr's Avatar
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    ^Well, basically. You can make itunes check Saurik's server and get the "ok" instead of checking Apples. But yeah, the server needs your backup files.

  9. #9
    Super Moderator Cer0's Avatar
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    Yep, after you redirect you host file to saurik's site.


    So then that way itunes when it checks for the "ok" it will be directed at saurik's server instead and his sends back the "ok" for it if you have that firmware version blob (shsh) stored.

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