Tuesday, May 24, 2016

iOS 5 Will Stop SHSH Firmware Downgrades



It has just been reported that the new iOS 5 is going to halt SHSH firmware downgrades on iPhone, iPad and iPod Touch. This is rlly bad news for all those jailbrkers and it comes as the Dev Tm begin explaining what �s iOS 5 betas are revling. It seems is determined to combat SHSH blobs moving forward and are aggressively combating the replay attacks that have allowed users to use iTunes to restore to previous firmware versions using saved SHSH blobs.

has stated to make more use of the APTicket once you install iOS 5 and beyond and they will be checking on ch boot of an iDevice. The problem for jailbrkers is that the APTicket will be uniquely erated every time an iPhone, iPad or iPod touch is restored and this mns that existing methods of saving SHSH blobs will no longer work. are also making sure that they are the only ones that will know what the APTicket should be.

APTIcket is changing starting with iOS 5 and it is being used like the BBTicket. The LLB and iBoot stages of the boot sequence are also being refined to depend on the authenticity of the APTicket. This is going to happen at every boot and because has the crypto to properly sign the per-restore APTicket, replayed APTickets are useless.

According to the Dev Tm this points to a new approach from but until brings out the final relse of iOS 5 the Dev Tm are still guessing at what are planning to do.

There is still a little bit of good news for jailbrkers and Geohot�s Limera1n which takes effect before any APTicket checks are made could still provide a tethered jailbrk solution. As this is also only going to affect restores starting at iOS 5 and onward Geohot�s Limera1n will work and so should any other tethered jailbrks.

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