download programs for free tinyumbrella for windows 7

So you cannot restore to 6.x using SHSH blobs except on iPhone 4, iPhone 3GS, and iPod touch 4G (and iPad 2 to iOS 5.x if you have iOS 4.x and iOS 5.x SHS blobs).ĭespite the lack of support for new iOS versions, it is considered a good practice to take a backup of the SHSH blobs, so if someone discovers a way to hack the restore process in the future to again using the custom IPSW firmware file, then the SHSH blobs would come in handy. Tools like TinyUmbrella have allowed you to save the SHSH blobs, so you can use it to create (stitch) a pre-signed IPSW file, which could then be used to restore your device with an iOS version that Apple was no longer signing.Īpple has closed the loophole that allowed users to use the SHSH blobs in newer devices (iPhone 4S and later) and also in iOS 7 or later. For example: If Apple allowed users to downgrade their device, they could downgrade back to iOS 8.1.2, which was the last iOS software update that could be jailbroken using the TaiG and PPJailbreak.Īpple stops signing the firmware files (by not providing SHSH blobs) for older iOS versions to prevent users from downgrading. When iTunes verifies the firmware restore for the devices listed below, it checks if you are allowed to restore to the version you are requesting.Apple allows you to restore to the latest iOS versions only to prevent users from downgrading to an older iOS version, which would have made it easier to jailbreak the iOS device. TinyTSS is a small java app that acts as your very own signature service. It saves SHSH signatures for your device received from the Apple server and let to downgrade OS indefinitely. Apple stops signing older firmwares once a new one is out.įirmwareUmbrella sends the same exact request that iTunes sends Apple when requesting the signatures for your device to be restored. If the signature does not match, the device raises an error and the restore process stops. If the signature matches then the restore process can continue. Your device checks the information and verifies the signature (making sure it really came from Apple because it CANNOT be forged as the encryption is very high). iTunes packages up this valuable information and sends it to your device. Apple takes the firmware version files and combines them with your ECID and generates a hash that ONLY APPLE can generate. It is signed with a unique id (ECID) that only your device has. See, the firmware is now signed for the below devices. The way they stop you is basically by a simple response that iTunes receives when you try to restore the firmware of your choosing.

Once you ‘upgrade’ they don’t let you downgrade. When you try to restore an older firmware on the devices listed below, Apple won’t let you do that.

Download programs for free tinyumbrella for windows 7