How to backup SHSH on iPad2? SHSH is a certificate that verifies the legitimacy of iTunes recovery firmware operations. When we use iTunes to restore firmware, iTunes will submit the ECID of the firmware device to be restored to the Apple verification server and apply to obtain the SHSH verification certificate for restoring that version of firmware (that is, each version of firmware, such as version 4.3.2 , the SHSH corresponding to firmware versions 4.3.3 and 4.3.5 are different and unique), Apple will send a SHSH certificate corresponding to the ECID to iTunes through the verification server, so that iTunes can continue to interact with this SHSH Corresponding version of firmware recovery. For example, SHSH is like a key. Only when you have the key numbered 4.3.3 can you open the lock numbered 4.3.3, and then you can enter the door numbered 4.3.3.
The significance of backing up SHSH
The SHSH file exists on Apple servers, and whenever a new firmware is released, Apple will close the previous version of the SHSH file Provided, then when we restore the firmware, especially when we need to downgrade for a perfect jailbreak, we must have the SHSH file corresponding to the corresponding version. At this time, it becomes important to back up the SHSH. For the same analogy, if Apple provides keys numbered 4.3.5, it will put away the keys numbered 4.3.3 and will not give them to you. Therefore, you should back up the keys when Apple returns the keys numbered 4.3.3 to you. Unfortunately, when you read this article now, Apple really no longer provides SHSH before 4.3.5. At this time, you can only hope that your mobile phone will be released in mid-July 2011 (July Apple Temporarily reopened and passed the 4.3.3 verification) before jailbreaking and praying to cydia to help you save the 4.3.3 version of SHSH.
The iPad2 backup SHSH is the same as the iPhone4 backup SHSH. As long as I try to backup SHSH on iphone4, I will backup SHSH on iPad2.
Use ITunes to back up SHSH tutorial
1. iTools operation method:
1. Connect the device to the PC with a data cable and run iTools (required under win7 Right-click and select Run as administrator)
2. The current status will be displayed on the iTools main interfaceInformation about connected devices. Select the SHSH management option.
3. The right side will prompt the currently connected devices and a list of devices that have been connected to backup SHSH. Select (left mouse click) the device you need to back up SHSH on. Then click the Save SHSH entry button above.
4. The information list below will prompt the current SHSH backup status. Whenever a new version of firmware is updated, the SHSH corresponding to the old version cannot be backed up, so it will prompt: "Failed, you acted too late."
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5. When you want to restore a lower version of firmware, you not only need the SHSH file, but also need to use iTools to start the TSS service. This step is very simple.
6. When you click to start the TSS service, a confirmation dialog box for modifying the host file will pop up. Click OK. If it is a win7 system, you must run the program as an administrator.
7. Allow this in fire protection q1ang or other software that protects host files item operations. You will see the success prompt after a while, and you can now use iTunes to flash back to the lower version of the firmware.
2. Backup path
1. Windows 7 system ：Computer C drive user computer name My Documents itoolsconfig
2. Windows XP system: C:Documents and Settings user name My DocumentsiToolsConfig