Apple is reportedly preparing to ramp up the preventative measures it uses to prevent iOS device owners from restoring older firmware versions, a system often used as part of jailbreak and/or unlocking hacks. As of iOS 5, the iPhone Dev Team reports, Apple will be stepping up the authentication process on the "APTicket" which deems whether a particular firmware version can be installed on an iPhone, iPad or iPod touch or not. Even those owners who have "saved their blobs" - aka keeping a record of SHSH details for each firmware version - so that they can backtrack to earlier, more hack-friendly iterations of iOS will be affected.
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