The founder of Cydia has come up with some interesting offer. SHSH blobes for iOS 5.0.1 and signatures are available with the release of iOS 5.0.1 untethered jailbreak. Saurik is caching the SHSH blobs for iOS 5.0.1. If you want to find the 5.0.1 signatures, just check your Cydia account you will definitely find it there.
In order to provide the flashback about the SHSH blobs, it is the signature file that is verified against Apple servers to make sure that the users are on the latest firmware.
You need to save your SHSH blobs to downgrade to a previous firmware since Apple doesn’t allow that once you upgrade.
You need to save your SHSH blobs to let users return to the older iOS version by downgrading to a previous firmware.
The Cupertino giant is has made it compulsory that each restore must be verified separately by its servers. You will witness ‘Verifying restore with Apple’ during a restore in iTunes at the top of information bar. This process consists of an easy challenge or the response protocol that uploads a partial digest of the firmware file to Apple. After which the tech giant will decide whether to restore it or not. SHSH enables this process to be bypassed effectively by verifying the restore via Saurik’s servers instead.
So if you have upgraded your device to the newly released update you can downgrade back to iOS 5.0.1.
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