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Yeah, you used to be able to cache these shsh blobs and reuse them to install the same iOS image in the future again because they didn't change. Since quite a
by svenpeter 6y ago
Yeah, you used to be able to cache these shsh blobs and reuse them to install the same iOS image in the future again because they didn't change.
Since quite a few years the iPhone generates a new random nonce during each restore though and requires that nonce to be signed by Apple to proceed. This makes caching the response useless for downgrading.
https://www.theiphonewiki.com/wiki/Nonce https://www.theiphonewiki.com/wiki/Nonce
- skinnymuch 6y agoI’ve downgraded without issue twice in recent years. Must be a jailbreak thing then. Every one is always saying to save your shsh blobs so I don’t know. I don’t think that wiki or most sites are that up to date with jailbreaking stuff since the peak of jailbreaking was so long ago.