ECID

2012-05-28T05:53:49Z

Rocking devil:

The '''ECID''' (possibly standing for '''E'''xclusive '''C'''hip '''ID''' or '''E'''lectronic '''C'''hip '''ID''') is an identifier unique to every unit.

ECID looks like this: <tt>00000XXXXXXXXXXX</tt> (hex)

Please be aware that some tools display the ECID in decimal format.

The ECID is a very important element in the [[SHSH Protocol]]

== Get your ECID ==
===Mac Instructions===
*Put your device in [[Recovery Mode]] or [[DFU Mode]].
*Open System Profiler. (in /Applications/Utilities/)
*In the sidebar, go to "USB" (in the "Hardware" section)
*Under "Serial Number", there should be a part called "ECID". There you go.

===Windows Instructions===
* Put your device in [[Recovery Mode]] or [[DFU Mode]].
* Open Device Manager and right click on Apple Mobile Device (Recovery or DFU Mode) for properties
* Click on the details tab
* Click on the dropdown box and select Device Instance Path
* You should find it in the textbox

===Developer Instructions===
Call the AMDeviceCopyValue function in the [[MobileDevice Library|MobileDevice Framework]] with the "UniqueChipID" value. It returns the ECID as a CFNumber(kCFNumberSInt64Type) object.

=== Extract your ECID from an shsh ===
There are 19 blobs in an shsh,and the first line of every blob is the same as below:

RElDRUAAAAAIAAAA********AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

The * part is the ECID(Dec) encrypted by a certain formula which is

a.Transform ECID(Dec) into ECID(Hex) such as 58608372174291 ---> 35 4D D3 34 4D D3

b.Reverse the ECID(Hex) string such as 35 4D D3 34 4D D3 ---> D3 4D 34 D3 4D 35

c.Transform the string we have got into binary such as D3 4D 34 D3 4D 35 ---> ÓM4ÓM5

d.Encode the binary with base64 such as ÓM4ÓM5 ---> 00000001

Use this formula backward (d. to a.) we can extract the * part into ECID(Dec).

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ECID