Shsh Blobs

iOS 5 could shut down SHSH downgrades?

By Rene Ritchie, Sunday, Jun 26, 2011 a 8:12 pm

How to save your SHSH blobs with TinyUmbrella [Jailbreak]

By Staff, Thursday, Oct 28, 2010 a 4:28 pm

With Cydia currently not giving new users the ability to save their SHSH blobs it seemed like a good time to go over how to save your SHS blobs with an alternative, TinyUmbrella. An SHSH blob or ECID SHSH is basically a unique signature which is checked against Apple servers whenever you decide to restore the firmware on iPhone, iPad and iPod touch. Once a new firmware is released, Apple stops signing the older firmware, hence making it impossible to restore back to the older firmware from iTunes. So, YOU MUST SAVE YOUR SHSH WHILE APPLE IS CURRENTLY SIGNING THEM.

Now to “why is it important to save your SHSH blobs”: The creator of Cydia has setup a new server which basically mimics Apple’s verification server and can save your older signature (SHSH blob) so that you can downgrade or restore back to the older firmware. This is important because if you don’t have your SHSH blob saved, and accidently update to new firmware, you’ll loose your jailbreak and furthermore, you wont be able to downgrade back to older firmware to re-jailbreak your device.

Cydia no longer giving new users the option to save SHSH blobs [Jailbreak]

By Staff, Wednesday, Oct 27, 2010 a 4:51 pm

In the past Cydia has given the option to "Make my life easier" which automatically saved SHSH blobs on the Cydia server, but since the release of limera1n and greenpois0n, this option has disappeared and your saved SHSH blobs are not shown on the Cydia front page. The Cydia server is still up and running, and any SHSH blob that you saved previously is still saved. Also TinyUmbrella, which uses the Cydia server, still works perfectly and should be used to make sure your 4.1 SHSH blobs have been saved.

More Apple TV fun: 1080p in, Xcode, PhoneView

By Rene Ritchie, Thursday, Sep 30, 2010 a 5:57 pm

As Apple TV (2010) makes its way out into the world people are figuring out more of what you can and can't do with it, including Engadget who says there's 1080p in (but not out) via iTunes:

We just ran some tests on the AppleTV's playback limits by streaming 1080p movie trailers in iTunes and managed to verify murmurs saying the device can accept 1080p content. Unfortunately, output is a different story, since it downscales the image back to 720p on your display

TUAW meanwhile plugged it into PhoneView to access the AFC service area, tried Ping (the network IP command, not iTunes social music!), VLC, used TinyUmbrella to save SHSH blobs, and more:

You can register your Apple TV device in Xcode (it shows up immediately) to the iOS developer portal but you cannot perform any actual development -- yet. Xcode complains that Apple TV does not "support development". Bummer that.