Second OpenPGP-card

[Jakob Bohm]

On 2024-02-17 12:37, Juergen BRUCKNER via Gnupg-users wrote:
> Hello Jacob,
>
> Am 17.02.24 um 12:04 schrieb Jakob Bohm via Gnupg-users:
> [...]
>>> I don't know exactly how the situation about this is in Germany. But 
>>> here in Austria many mobile phone shops have a SIM card punch with 
>>> which you can punch out a micro-SIM or nano-SIM from a standard-SIM.
>>>
>> In some other countries, the mobile providers issues SIMs that are
>> pre-punched to pop out either of the 3 small sim sizes from a full
>> credit-card sized card where key information like the PUK code and
>> serial number are printed.
>>
>> More generally, there is no guarantee that hardware cards not sold
>> through mobile phone carriers keep the actual chip/electronics within
>> the nano-sim area near the middle of the contacts, most notably, NFC
>> compatible cards will often have the NFC antenna outside that area,
>> and it's a matter of luck if the contact card functionality works
>> after cutting on any given hardware model.
>>
>
> We are not talking about 'normal SIM cards' for use by mobile 
> telephony but rather about the OpenPGP Smart Card V3.4 in SIM format 
> [1]. This also doesn't have NFC functionality, so it can be punched 
> fairly safely. You just have to do it right
>
Exactly, and there is no easy way of knowing if the cards used by
floss-shop havechip parts outside the nano-sim boundary, which is
smaller than the contact area on ID000 cards (seriously possible),
nor if those cards are internally multi-chip constructs (rare but
possible).

Enjoy

Jakob
-- 
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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