triplets calculation

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Christoffer Jerkeby kugghjul at gmail.com
Mon Nov 26 13:19:37 UTC 2012


On Thu, Nov 22, 2012 at 7:13 PM, Holger Hans Peter Freyther
<holger at freyther.de> wrote:
> On Thu, Nov 22, 2012 at 03:12:32PM +0100, Yann R. Moupinda wrote:
>>
>> Hi guys,
>
> Hi,
>
>
>> Why does the authentication succeed buy using sysmocom sim card with weak RAND
>> (10101010101010101010101010101010) and fail by using strong RAND values
>> (e177842fe16c47de84784be1b4141c27) ?
>
> no idea, can you provide an example program (e.g. pySIM based) that illustrates
> the issue?
>
> holger
>


While agreeing that you need to give an example of what goes wrong, I
happen to notice all your "bad" RAND values contains lowercase HEX
characters while your "good" ones only contains uppercase HEX
characters. I dont know if that matters in your application.

But only accepting weak keyes is not logical.

Regards Kugg




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