If you have blobs and a compatible device, here are the tools you need:
The term "Blob" refers to the complex, encrypted data structure returned by the server. It contains multiple components, including the device's nonce (a random number used once), the firmware hash, and the device's unique ID, all encrypted with Apple's private keys. shsh blobs
Most jailbreaks target older, vulnerable versions of iOS. Having blobs for those versions allows you to move to them even after Apple has patched the exploits in newer updates. How to Save Your SHSH Blobs If you have blobs and a compatible device,
Your device sends its ECID and the firmware version to Apple's servers. Having blobs for those versions allows you to
The community standard for saving blobs is (often called "TSS Saver") or the tool shsh.host .
(Signature Hash blobs) are essentially digital certificates that Apple uses to authorize the installation of a specific iOS version on a specific device. They serve as a gatekeeper mechanism to ensure that users cannot downgrade their device's operating system to an older, potentially less secure version.
: When you restore an iPhone, it requests a signature from Apple's servers. If Apple has stopped "signing" that version (usually about a week after a new release), the restore fails.