Shsh Blobs Updated
This is where SHSH blobs enter the picture. They are the closest thing the iOS world has to a time machine. This article will explain what they are, how they work, why Apple hates them, and why they have become harder to use than ever before. SHSH stands for Signature HaSH . A "blob" is simply a small piece of data (a file). In non-technical terms, an SHSH blob is a digital handshake or a ticket between your iPhone and Apple's verification server.
SHSH blobs are a "Hail Mary." They are worth saving (it costs nothing), but do not assume you will ever use them. The SEP wall is currently too high. Final Pro-Tip for Enthusiasts Even if you think you will never downgrade, save your blobs today. Use the TSS Saver website. It takes 30 seconds. One day, a jailbreak for your current version might drop after Apple stops signing it. If you have the blobs, you can use a tool like FutureRestore to jump back. shsh blobs
If you try to downgrade to iOS 14 using blobs, but the latest signed SEP is from iOS 17, the restore will fail. Your iPhone will bootloop because the old OS cannot talk to the new, incompatible security chip. Apple modified the signing protocol. Older blobs just required the ECID. Modern blobs require the generator (a specific nonce). This is where SHSH blobs enter the picture
