Saving SHSH blobs is a proactive security measure for jailbreakers. By using third-party tools to request and store these blobs while a version is still being signed, you effectively "save" your permission to install that version later.
Understanding SHSH Blobs: The Key to iOS Downgrades In the world of iOS customization and jailbreaking, few terms are as critical—or as misunderstood—as . If you have ever wanted to downgrade your iPhone to an older version of iOS to regain a specific feature or install a jailbreak, you have likely run into the wall of Apple's "signing windows." shsh blobs
Starting with iOS 5, Apple introduced a nonce —a random string of numbers generated for every single restore attempt. This means a saved blob will only work if your device generates the exact same nonce that was used when the blob was originally saved. Saving SHSH blobs is a proactive security measure
In the era of the iPhone 3GS and iPhone 4, blobs were static. You could capture a blob once and reuse it indefinitely. If you have ever wanted to downgrade your
A desktop application that automatically finds your ECID and saves blobs to your computer or the cloud.
.ipsw firmware file, and a compatible "SEP" (Secure Enclave Processor) firmware version. Compatibility Check: Downgrading is only possible if the current signed iOS version has an SEP that is compatible with the target version you are moving to. Process: Use the terminal/command line to run FutureRestore, pointing it to your blob and firmware file.
You can always move to the latest version.