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SHSH2 File - What is an .shsh2 file and how do I open it?

Learn about .SHSH2 files and view a list of programs that open them.

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Overview

What is an SHSH2 file? An SHSH2 file is a digital signature used to authenticate iOS firmware. It contains data that Apple's servers use to verify that a user is installing an approved version of iOS. Primarily, SHSH2 files prevent users from downgrading their firmware .

More Information When you install a new version of iOS on your iPhone, iPad, or other iOS device, your device generates an SHSH2 file. Apple's servers read this SHSH2 file, which is sent as a digital signature, to verify that the version of iOS you are installing is current, and therefore allowed to be installed. Most iOS users will never actually encounter an SHSH2 file. However, those who want to revert to a previous, unsigned version of iOS (likely to jailbreak their device) will need to manually generate an SHSH2 file. Websites such as TSS Saver and SHSH Host allow users to save and generate SHSH2 files, using their device's ECID and model identifier. NOTE: iOS digital signatures may also be saved as .SHSH files.

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.SHSH2 File Extension

iOS SHSH Blob

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What is an SHSH2 file?

An SHSH2 file is a digital signature used to authenticate iOS firmware. It contains data that Apple's servers use to verify that a user is installing an approved version of iOS. Primarily, SHSH2 files prevent users from downgrading their firmware .

More Information

When you install a new version of iOS on your iPhone, iPad, or other iOS device, your device generates an SHSH2 file. Apple's servers read this SHSH2 file, which is sent as a digital signature, to verify that the version of iOS you are installing is current, and therefore allowed to be installed.

Most iOS users will never actually encounter an SHSH2 file. However, those who want to revert to a previous, unsigned version of iOS (likely to jailbreak their device) will need to manually generate an SHSH2 file. Websites such as TSS Saver and SHSH Host allow users to save and generate SHSH2 files, using their device's ECID and model identifier.

NOTE: iOS digital signatures may also be saved as .SHSH files.

How to open an SHSH2 file

SHSH2 files are not meant to be opened. Those looking to downgrade to a previous version of iOS can use jailbreaking tools such as iFaith (Windows), 3uTools (Windows), and futurerestore (cross-platform) to use an SHSH2 file to install a previous version of iOS.

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Programs that open or reference SHSH2 files

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Program Name

Platform

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X

Windows

iH8sn0w iFaith

Free

3uTools

Free

futurerestore

Free

Mac

futurerestore

Free

Linux

futurerestore

Free

Category: System Files

Updated: July 6, 2021

FAQ

What is an SHSH2 file?↓
An SHSH2 file is a digital signature used to authenticate iOS firmware. It contains data that Apple's servers use to verify that a user is installing an approved version of iOS. Primarily, SHSH2 files prevent users from downgrading their firmware.
How do I open an .shsh2 file?↓
SHSH2 files are not meant to be opened. Those looking to downgrade to a previous version of iOS can use jailbreaking tools such as iFaith (Windows), 3uTools (Windows), and futurerestore (cross-platform) to use an SHSH2 file to install a previous version of iOS.

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