DRK = Device Root Key - GSM-Forum

rikirik · 03-27-2016, 18:01

Can someone explain to us what DRK is, how it gets damaged, how do we know if our phone needs DRK repair and what phones need this?

Thanks

souma_k · 03-27-2016, 18:16

Drk will be damaged when you mess with the EFS partition

Sent from my GT-I9500 using Tapatalk

rikirik · 03-27-2016, 18:23

DRK is a device-unique asymmetric key pair that is signed by Samsung’s root key through an X.509 certificate. This certificate proves that the DRK was produced by Samsung. The DRK is generated at manufacture time in the Samsung factory and is stored on the device encrypted by the DUHK, thus binding it to the device.

What devices have DRK?

zozodouce · 03-28-2016, 12:43

Quote:

Originally Posted by rikirik

DRK is a device-unique asymmetric key pair that is signed by Samsung’s root key through an X.509 certificate. This certificate proves that the DRK was produced by Samsung. The DRK is generated at manufacture time in the Samsung factory and is stored on the device encrypted by the DUHK, thus binding it to the device.

What devices have DRK?

Starting with the S6/S6 Edge, S6 Edge plus, Note 5, S7/S7 Edge. I'm sure there are more phones, I've only listed all the major ones and I don't care about all the other little phones that Samsung makes.

Jamessr79 · 01-12-2017, 09:47

Quote:

Originally Posted by rikirik

DRK is a device-unique asymmetric key pair that is signed by Samsung’s root key through an X.509 certificate. This certificate proves that the DRK was produced by Samsung. The DRK is generated at manufacture time in the Samsung factory and is stored on the device encrypted by the DUHK, thus binding it to the device.

What devices have DRK?

Okay, I hope I don't upset anyone. I did a update to my Galaxy S6 and I get "Device does not have DRK (Device Root Key), contact to SW PL. I have read a few descriptions on the DRK. I see you say it is device unique. My question is I have two GS6 one with a good DRK one with issues. Can I take the good DRK and copy it to the one with issues? I am not sure how the issue came about, as I just tried to update.

Thanks for any help in this mater.

cwcast · 01-12-2017, 14:59

All you need is flash eng soft and repair drk, and then flash stock.

Jamessr79 · 01-12-2017, 23:13

Quote:

Originally Posted by cwcast

All you need is flash eng soft and repair drk, and then flash stock.

I have tried to flash a few different DRK-fix-kernel. They were listed in some other forums stating they would fix the issue. Tried flashing via odin and they all stopped at NAND Write Start. I have not flashed eng soft as none of the other tutorials mentioned this. I will look for the correct eng soft and try that way. I do thank you for your help.

03-27-2016, 18:01	#1 (permalink)
rikirik Junior Member Join Date: Mar 2007 Posts: 10 Member: 459089 Status: Offline Thanks Meter: 1	DRK = Device Root Key Can someone explain to us what DRK is, how it gets damaged, how do we know if our phone needs DRK repair and what phones need this? Thanks

03-27-2016, 18:16	#2 (permalink)
souma_k Product Supporter Join Date: May 2013 Location: IN THIS WORLD ,LB,RO, Posts: 2,650 Member: 1933823 Status: Offline Thanks Meter: 1,273	Drk will be damaged when you mess with the EFS partition Sent from my GT-I9500 using Tapatalk

03-27-2016, 18:23	#3 (permalink)
rikirik Junior Member Join Date: Mar 2007 Posts: 10 Member: 459089 Status: Offline Thanks Meter: 1	DRK is a device-unique asymmetric key pair that is signed by Samsung’s root key through an X.509 certificate. This certificate proves that the DRK was produced by Samsung. The DRK is generated at manufacture time in the Samsung factory and is stored on the device encrypted by the DUHK, thus binding it to the device. What devices have DRK?

01-12-2017, 14:59	#6 (permalink)
cwcast No Life Poster Join Date: May 2009 Location: USA/NY Posts: 1,095 Member: 1025079 Status: Offline Thanks Meter: 311	All you need is flash eng soft and repair drk, and then flash stock.