General Apparently you can downgrade from iOS 8 to 7.1.2! Check this out.

Discussion in 'Jailbreaks and iOS Hacks' started by sendmeamsg, Oct 25, 2014.

  1. sendmeamsg macrumors newbie

    Joined:
    May 2, 2010
    #1
    I'm one of the few people apparently still rocking the iPhone 4, so this doesn't apply to me and I have no way of testing it, but I have a number of friends who've been complaining that iOS 8 has made their iDevices sluggish and buggy (especially the 4s and iPad 2/3). I found it weird that there was absolutely no way to get around the firmware signing requirements... until I stumbled across this: http://www.saurik.com/id/12

    "To this end, I have constructed a server that duplicates the functionality exposed by Apple's signature server, except using "on file" results rather than live requests.
    All we need, then, is to make iTunes use it. Luckily, most operating systems also have the ability to locally define bypasses on specific hostnames through a file called hosts. Using this, we can redirect requests to Apple's signature server to Cydia.
    So, open the file C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (Mac OS X) and add the following entry to the bottom of the file.
    74.208.10.249 gs.apple.com
    Now, when iTunes thinks it is talking to Apple, it is talking to Cydia instead. Doing this will allow iTunes to access signatures already stored by Cydia's "on file" feature.
    This server will also act as a cache for any SHSH blobs it hasn't seen, acting as an intermediary to Apple's server. This effectively registers your device with the "on file" mechanism, which means you can now enjoy the protections of being able to downgrade your firmware in the future even if you aren't jailbroken."

    I have no way of testing this myself, and your mileage may vary, but from what I can see, it looks like it should work and allow you to downgrade your firmware (to any version, for that matter, not just 7.1.2). I'd love for someone to let me know if it works! Proceed with caution, obviously.

    Anyway, hopefully some of you find this useful.
     
  2. bushido Suspended

    bushido

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    Germany
    #2
    nah thats a old post thats talking about iOS3 ... i think the last iOS that supported the blobs method was iOS5
     
  3. sendmeamsg thread starter macrumors newbie

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    May 2, 2010
    #3
    Yep, just kidding. See that now. My bad! Shame on Apple for this...
     
  4. Applejuiced macrumors Westmere

    Applejuiced

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    At the iPhone hacks section.
  5. sendmeamsg thread starter macrumors newbie

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    May 2, 2010
    #5
    Yea, I suppose it was too good to be true. Not to mention the fact that I apparently can't read. Is there a dunce cap I can wear?

    Still surprised someone hasn't figured a way around this, though...
     
  6. Applejuiced macrumors Westmere

    Applejuiced

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    #6
    Lol:D
    You gotta stay in the corner for 15 minutes.
     
  7. dhlizard macrumors G4

    dhlizard

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    #7
    Now where is that FacePalm video/graphic others have posted in response to threads like this ??
     
  8. Snide macrumors 6502a

    Snide

    Joined:
    Apr 12, 2005
    #8
    [​IMG]
     
  9. eyoungren macrumors P6

    eyoungren

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    #9
    Hey OP, got a way to downgrade from 7.1.2 to iOS 6?

    Now THAT would be a breakthrough! :D
     
  10. XboxMySocks macrumors 68020

    XboxMySocks

    Joined:
    Oct 25, 2009
    #10
    How are you supposed to "figure a way around" a 256bit AES key?
     
  11. Applejuiced macrumors Westmere

    Applejuiced

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    #11
    Or if we could dual boot to ios and Yosemite.
    Someone put up a youtube video of that:D
     
  12. eyoungren macrumors P6

    eyoungren

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    #12
    I was thinking maybe someone could figure out a way we could run MS-DOS 6.0 on an iPhone.

    I don't think we'll get any takers for that one though. :p
     
  13. headsh0t95 macrumors regular

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    Netherlands
    #13
    Brute force it with your graphics card using oclhashcat or something similar
     
  14. Applejuiced macrumors Westmere

    Applejuiced

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    #14
    It's just so simple and easy to do:)

    ----------

    Something like that shouldn't be that hard I would think.
    But pretty much pointless :D
     
  15. XboxMySocks macrumors 68020

    XboxMySocks

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    #15
    This is a joke right?
     
  16. darricksailo macrumors 601

    darricksailo

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    Dec 18, 2012
    #16
    You do realize it's realistically impossible to brute force a AES 256bit key in a reasonable amount of time, right?

    Even with the super computers we have today can't
     
  17. XboxMySocks macrumors 68020

    XboxMySocks

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    #17
    If I recall correctly the best supercomputer we have would need about 2 weeks to crack it.

    However, it costs something like $500.000 :)
     
  18. darricksailo macrumors 601

    darricksailo

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    Dec 18, 2012
    #18
    I'm not an expert about encryption by any means but I do remember reading an article and hearing from somewhere that it would take longer than the age of the universe to crack, even with a super computer (assuming we're not using some new method of cracking AES encryption)

    I never did look too much into it though so not quite sure if what I heard was correct or not
     
  19. Wowzera macrumors 6502a

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    Brazil
    #19
    "AES permits the use of 256-bit keys. Breaking a symmetric 256-bit key by brute force requires 2128 times more computational power than a 128-bit key. 50 supercomputers that could check a billion billion (1018) AES keys per second (if such a device could ever be made) would, in theory, require about 3×1051 years to exhaust the 256-bit key space."
     
  20. Applejuiced macrumors Westmere

    Applejuiced

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    #20
    Correct.
    I heard it could take something like 80-100 years even with today computer tech to crack it.
     
  21. troy14 macrumors 6502a

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    #21
    What if the computer was super lucky and got it within a year? :eek:
     
  22. Applejuiced macrumors Westmere

    Applejuiced

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    #22
    Lol:D
    That's very true.
     
  23. TriJetHero macrumors 601

    TriJetHero

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    #23
    Indeed, running the max would mean that the last combination was the key.

    Who knows were it is....
     
  24. From A Buick 8 macrumors 68040

    From A Buick 8

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    Ky Close to CinCinnati
    #24
    In my experience, every time I am looking for something it is always in the last place I look. :cool:
     
  25. PSB136 macrumors member

    Joined:
    Oct 26, 2014
    #25
    You can. Get the iDOS app (it's in the App Store). It even runs a modified Win 95.
     

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