What's the issue with Comp128v2\v3 - GSM-Forum

SIMCarder · 12-18-2011, 22:51

Hey,

I've been doing a lot of research and I'm curious to what exactly is the issue with cracking Comp128v2\v3 cards? I understand the principal of the algorithm and the fact that the Ki can never be commanded to be read directly. I understand the protections that disable the sim. What I don't understand is why do we even have to crack them? We have a physical piece of hardware and the Ki is physically on the hardware. Given the right equiptment I supose someone could desolder the chip (ROM equivilant) that holds the Ki and read it raw. Am I missing something?

Bph&co · 12-19-2011, 10:16

Hi,

I am not sure why someone would need the actual Ki, maybe to allow to decode
eavesdropped comms ? I remember one use of it - when the iPhone was released
in 2007, the first trick we used was custom PIC card programmed with my Ki and
locked MCC+MNC.

Smart cards are regarded as uncrackable by general population, but if there was
real need for the new comp algo, or the 3G one, it would have been extracted
by somebody already.

BR

SIMCarder · 12-19-2011, 10:40

I thought the entire purpose of SIM Cloning was to obtain the Ki so that you can burn it into your blank sim. Two SIMs with the same exact IMSI + KI = Clone.

The IPHONE used v1 cards? I thought it was a little more advanced than that.

dexterbot · 12-22-2011, 10:25

LOL iPHONE using simv 1 ?? and locked LAC MNC ,and a working Ki ,,??? why do he needs 2 lock it if you have a Ki code , . simcarder i send you a mail , no reply , i hack simcards ,
did you see my youtube movies , maybe you like to hack some ?

dexterbot · 12-22-2011, 10:27

you don't need Ki for listening , you need Kc and LAC settings ,IMSI , and IMEI

12-18-2011, 22:51	#1 (permalink)
SIMCarder Junior Member Join Date: Dec 2011 Posts: 3 Member: 1706379 Status: Offline Thanks: 0 Thanked 0 Times in 0 Posts	What's the issue with Comp128v2\v3 Hey, I've been doing a lot of research and I'm curious to what exactly is the issue with cracking Comp128v2\v3 cards? I understand the principal of the algorithm and the fact that the Ki can never be commanded to be read directly. I understand the protections that disable the sim. What I don't understand is why do we even have to crack them? We have a physical piece of hardware and the Ki is physically on the hardware. Given the right equiptment I supose someone could desolder the chip (ROM equivilant) that holds the Ki and read it raw. Am I missing something?

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12-19-2011, 10:16	#2 (permalink)
Bph&co Product Supporter and selective member Nsspro Join Date: Feb 2000 Location: UK Posts: 3,166 Member: 1024 Status: Offline Thanks: 618 Thanked 5,447 Times in 655 Posts	Hi, I am not sure why someone would need the actual Ki, maybe to allow to decode eavesdropped comms ? I remember one use of it - when the iPhone was released in 2007, the first trick we used was custom PIC card programmed with my Ki and locked MCC+MNC. Smart cards are regarded as uncrackable by general population, but if there was real need for the new comp algo, or the 3G one, it would have been extracted by somebody already. BR

12-19-2011, 10:40	#3 (permalink)
SIMCarder Junior Member Join Date: Dec 2011 Posts: 3 Member: 1706379 Status: Offline Thanks: 0 Thanked 0 Times in 0 Posts	I thought the entire purpose of SIM Cloning was to obtain the Ki so that you can burn it into your blank sim. Two SIMs with the same exact IMSI + KI = Clone. The IPHONE used v1 cards? I thought it was a little more advanced than that.

12-22-2011, 10:25	#4 (permalink)
dexterbot Junior Member Join Date: Nov 2011 Posts: 18 Member: 1697710 Status: Offline Thanks: 2 Thanked 1 Time in 1 Post	LOL iPHONE using simv 1 ?? and locked LAC MNC ,and a working Ki ,,??? why do he needs 2 lock it if you have a Ki code , . simcarder i send you a mail , no reply , i hack simcards , did you see my youtube movies , maybe you like to hack some ?

12-22-2011, 10:27	#5 (permalink)
dexterbot Junior Member Join Date: Nov 2011 Posts: 18 Member: 1697710 Status: Offline Thanks: 2 Thanked 1 Time in 1 Post	you don't need Ki for listening , you need Kc and LAC settings ,IMSI , and IMEI