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This mobile technology–related article is a stub. You can help Wikipedia by expanding it.

An SHSH Blob is a 128-byte RSA signature used to verify the validity of firmware on Apple iPhones.[1]

SHSH Blobs are an example of Public-key cryptography, the result of a digital signing process where the device user generates a public fingerprint from their hardware, including the Exclusive Chip ID (ECID), and the private key is held by Apple Inc[1].

Caching of this signature is used in methods of iOS jailbreaking.

References

  1. ^ a b iPhone Wiki -- SHSH
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