Validating stuff with iphone 4
Fortunately, there is a way to downgrade regardless of whether or not Apple is signing the firmware.To do that, though, you’ll need your SHSH blobs from that firmware.Lastly, i Faith features the ability to boot into Pwned DFU mode, which is a special type of recovery mode that’s necessary for i Tunes to recognize and restore to custom created firmware.For simplicity’s sake, just think of i Faith as a mix of Tiny Umbrella and Red Sn0w.Admittedly, that’s quite a bit to chew on, so we’ll take it step by step and break i Faith down into several important parts below. i Faith is an application that will take all of the available SHSH blobs that reside on your i Device so that you can use them in the future to restore your device to a particular firmware, even if Apple is no longer signing that firmware.Ariel Sanchez, a researcher at security assesment company IOActive, recently published a fascinating report on the sort of security you can expect if you do your internet banking on an i Phone or i Pad.The answer, sadly, seems to be, “Very little.” You should head over to IOActive’s blog to read the whole report.Backing up your SHSH blobs is an integral part of the jailbreaking philosophy.
The latest version of i Faith is 1.4.1 i Faith, like the more famous Tiny Umbrella utility, is a tool that allows you to save your SHSH blobs for later use. While Tiny Umbrella fetches the SHSH blobs from Apple’s server, i Faith will extract them directly from your device.
Unlike Tiny Umbrella, i Faith features the ability to create custom firmware (IPSW files) that are stitched together with your SHSH blobs.
In theory, this allows you to downgrade firmware in the future using a standalone firmware file.
i Faith also differs from Tiny Umbrella because it ties into its own caching server, while Tiny Umbrella relies on Cydia’s server for retrieving SHSH blobs.
Sanchez details the results of a series of offline security tests conducted against 40 different i OS banking apps used by 60 different banks in about 20 different countries.