Previously, hacker tihmstar announced that he plans to release a new tool called "Prometheus" that will allow users to downgrade or upgrade more unsigned versions of iOS.

It has also released a new tool called tsschecker that allows you to create and save the .shsh2 digital signature needed to run the Prometheus app, which is designed to downgrade or upgrade iOS versions that Apple no longer signs.

In itself, the way to save digital signatures.shsh was not entirely obvious to non-technically savvy users. Luckily, "1Conan", a Reddit user, has stepped in and created an online tool called AUTO-tsschecker that can save you the hassle of running terminal commands and will instead automatically generate and save .shsh2 signatures for you current version iOS.

To use the online tool, you need the ECID and ID of your iPhone devices, iPad or iPod Touch.

Howto know ECID yourhis iPhone,iPad or iPod Touch

  • Connect your iOS device to your computer.
  • Select the "Browse" tab in the left pane.
  • Click in the field Serial number on the Review tab until the ECID number appears.
  • Click right click mouse on the number and copy it to the clipboard.

Please note what you need hexadecimal value ECID. If you send a decimal ECID value, it will not store the correct digital signature.shsh2. You can visit this site to convert ECID decimal value to hexadecimal.

How to get an IDyouratiPhone devices,iPad or iPod Touch

How to saveanit.SHSH2signatures for iPhone,iPad or iPod Touch

  • Open the following link: https://tsssaver.1conan.com
  • Paste the ECID number you copied above.
  • Select the device type i.e. iPhone, iPad or iPod Touch.
  • Next, enter the ID of your iOS device, for example: 9.1 for one of iPhone models 7.
  • Click the "Submit" button.

And that's all. You will be presented with a page with the result and given a link to the digital signature saved.shsh2. In case you lose your link, you can download your digital signature.shsh2 by visiting the site again: https://tsssaver.1conan.com/shsh/ (please remember to convert HEX ECID to decimal value first).

In December, developers announced the Prometheus application, which allows you to downgrade the OS version on your iPhone, iPod touch or iPad. It's about versions operating system, which Apple stopped signing. In order to use the tool, you must save the SHSH blob certificates in advance.

SHSH blob is a digital signature file that the company uses to verify the iOS version on the device. Certificates saved using TinyUmbrella or savethemblobs are not suitable for use with Prometheus. Files in a special shsh2 format are required; they can be obtained using the TSSSaver service utility. The online tool TSSSaver Checker allows you to check the functionality of digital certificates

How to Save SHSH2 Blobs for iPhone and iPad Using TSSSaver

Step 1: Connect your gadget to iTunes and home page Find out the ECID number (click on the Serial Number field). Copy it to the clipboard with a right click.

Step 2: Find out the model of your device here.

Step 3: Open the website in your browser https://tsssaver.1conan.com/.

Step 4: In the “Type ECID Here” field, paste the ECID for your device.

Step 5: In the Identifier field, select your device model.

Step 6

Step 7: Wait until it completes, after which you will receive a link to the blobs. Click the link to download the certificate.

How to verify SHSH2 signature using TSSSaver Checker

Step 2: In the Blob field, click the Browse button and select the digital signature file on your PC.

Step 3: In the Identifier and iOS Version fields, specify the version of your device and operating system, respectively.

Step 4: Click the "I'm not a robot" button and then Submit.

Step 5: If the configuration parameters are selected correctly and you see “true” next to the “rosi” label, then everything is in order - the certificate can be used. Otherwise, repeat the previous step, saving the SHSH2 Blobs.

On mobile devices from Apple. For me personally, an iPhone or iPad without jailbreak, even if “is of little interest.” And I’ll add that it was precisely because of the possibility of “prison escape”, which allows you to turn the device into a more functional and convenient one, that I fell in love with these wonderful devices, and from the many on the market, I chose them.

What is SHSH?

When studying questions about how to jailbreak or how to roll back (downgrade) the iOS firmware version, you will definitely come across the concept of SHSH. In this article we will try to describe in detail what it is and why you should save SHSH.

And so, a little theory: SHSH or ECID SHSH, SHSH blobs are unique digital signature(certificate) of each mobile device, running on iOS. As you know, Apple allows you to reflash your i-device not to any firmware, but ONLY to the latest firmware version, which is available in . When restoring the firmware, it contacts Apple servers, to which it sends some corresponding software code and ECID ( unique identifier device), in response, an SHSH certificate is received, which is necessary for the iBoot module responsible for loading, and in due time it will determine the possibility of recovery (flashing). If the sent SHSH turns out to be invalid for the software version being restored, then iTunes will give you an error, usually 3194 and the only the easy way bringing your device back to life will involve restoring to the firmware version offered by iTunes. As a rule, for the latest version of iOS to which you will restore, hackers will not yet release a jailbreak and you will only have to wait for the release or, at best, use a “tethered jailbreak.” Lastly Apple time provides more serious protection for its software, this is also evidenced by the timing of the development of the next version of a complete jailbreak against hackers.

When restoring software, Apple checks SHSH on iPhone 3GS, iPhone 4, iPod Touch 3G, iPad, iPad 2, and starting with iOS 4, on iPhone 3G. If you update the firmware of one of these devices without saved SHSH, you will not be able to return to an older one. The only exception is the iPhone 3G - even without saved SHSH, you can always roll back to firmware version 3.x

Why save SHSH?

Saved SHSH certificates provide the ability to restore your device's software to the firmware version for which the SHSH were saved.

For example, you purchased an iPhone 4 with software version 4.3.3. At that time it was the most latest firmware, which was signed by Apple. When hackers released a jailbreak for this firmware, you immediately applied it to your device by saving SHSH in or using other programs (for example TinyUmbrella for Windows or TinyUmbrella for Mac OS X). After some time, Apple releases firmware version 4.3.4, thereby closing the vulnerabilities of firmware 4.3.3, with the help of which hackers were able to create a jailbreak utility. You have recovered to the new firmware 4.3.4, but after for a long time hackers could not find a solution to hack this firmware. You decided to roll back to 4.3.3. And since you have saved SHSH digital signatures for firmware 4.3.3, then using the TinyUmbrella program and then FixRecovery ( and ) you can easily roll back to 4.3.3 and perform the untethered jailbreak procedure!

Ways to save SHSH

SHSH digital signatures for Apple-signed firmware versions can be saved in the following ways.

It may not hurt to save the iOS 8.3 SHSH certificate using TinyUmbrella, which will retain the ability to downgrade to iOS 8.3 even after Apple stops signing the iOS 8.3 firmware file.

Before we get into the details of saving a SHSH certificate, here are some details about the SHSH certificate and why they are important.

As you probably know, Apple only allows you to restore your iDevice latest version iOS. But many users prefer to roll back to more old version firmware to make it easier to do jailbreak iOS devices.

Apple stops signing firmware files for old ones iOS versions to prevent users from downgrading to older iOS firmware. Tools like TinyUmbrella allow you to store SHSH certificates of still-signed firmware so that you can use those certificates to create a signed IPSW firmware file. Using tools like Redns0w, which allow you to use self-signed firmware files to restore your device. Nevertheless, Apple company closed a loophole that allowed users to use SHSH certificates to downgrade firmware (iPhone 4S and higher), as well as iOS 7 and later. Thus, you cannot restore iOS 6.x and higher using SHSH certificates with the exception of iPhone 4, iPhone 3GS, and iPod Touch 4G (and iPad 2 with iOS 5.x, if you have iOS 4.x and iOS 5. x SHS certificates).

However, SHSH certificates may be relevant again thanks to a new exploit discovered by iH8sn0w, developer of Sn0wbreeze and Posixspwn. He reported that it was possible to downgrade iOS to previous version using SHSH certificates, even if Apple no longer signs it. So for example, if it is not possible, then you can downgrade iOS 8.4 to iOS 8.3 even if Apple stops signing iOS 8.3 firmware files, and you can use Taig Jailbreak for.

How to save a SHSH certificate using the new beta version of TinyUmbrella:

  • Download new beta version of TinyUmbrella via this link (to download, click on the link in the right sidebar under Downloads/Links). The program is available for both Mac and Windows.
  • TinyUmbrella requires an installed Java package, you can download it from this link and install it on your computer.
  • Launch TinyUmbrella.
  • Now connect your iOS device to your computer. TinyUmbrella should automatically recognize it and start downloading all available SHSH certificates.

That's it. You have successfully downloaded SHSH certificates for your iOS device. In the list you will see SHSH certificates downloaded for iOS 8.3.

Answers to frequently asked questions:

  • TinyUmbrella will automatically download SHSH droplets for firmware files that are currently signed by Apple.
  • You can also obtain SHSH certificates from A7/A8 iOS 8.2 and earlier devices using TinyUmbrella.
  • All SHSH certificates are saved at: ~/.tu/.shsh. You can check this folder to see them.
  • Unlike the previous version, all SHSH certificates are saved in one file.
  • There are three types of SHSH certificates, namely: Update (recovery), Erase (Restore) and OTA. We assume they are intended for various types firmware.
  • TinyUmbrella contains entries for known devices in the ~/.tu/.known_devices folder. If you want, you can delete them to clear your history.
  • You cannot use the SHSH certificate of another iOS device. SHSH certificates are unique to one device, so it is important to download SHSH certificates for your device.

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In this article, you will learn what SHSH is and why save it?

SHSH certificate (ECID SHSH, SHSH blobs) is a unique digital signature that is verified on the Apple server when restoring the firmware via iTunes. If you update the firmware on your device, then install more old firmware you won't be able to go back, since SHSH for each new firmware different.

Saving the SHSH certificate is necessary first of all so that you always have the opportunity to roll back to an older firmware.

Method one

Just launch Cydia and it will automatically save SHSH to your server. And at the top of the screen a SHSH list of all saved firmware will appear. The disadvantage of this method is that you will not be able to install Cydia without jailbreaking it. It is better to save SHSH right away, since after the next firmware version is released, you will no longer be able to save SHSH for the current version.

Method two

No jailbreak is required to save SHSH using TinyUmbrella. The advantage of this solution is that TinyUmbrella stores SHSH not only on the Cydia server, but also on your computer.

Download the latest version for MAC or Windows

Step 1
Make sure iTunes is installed on your computer. Connect your device to your computer via a USB cable.

Step 2
Launch TinyUmbrella. On the left side of the window, in the “Connected Devices” section, the connected device will be displayed. Select it.

Step 3
Click on the “Save SHSH” button. The program will automatically download the current certificate from the Apple server, as well as all certificates saved on the Cydia server (if you saved them through Cydia).