remote sim network delay

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Thomas Chen tchen at on-go.com
Fri Nov 10 01:59:45 UTC 2017


i am not clear about how simtrace2, specifically

libcommon/source/card_emu.c

seems to handle the network delay for remote sim response

however, i dont understand how that would help ???


my understand of the protocol is that

ME => SIM  (first 5 bytes of APDU)

SIM <=== PROCEDURE (either INS as ack, or 0x60 to hold up the protocol)

but that does not help remote sim, as remote SIM would need the susequent bytes
which will not come until we send back INS,   so just holding off ME with 0x60
does not alleviate the problem of network delay


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