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  1. #1
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    WIM functionality; dual-chip vs single-chip vs build-in-WIM

    Posted by Mika Juuti, mika.juuti@epstar.fi
    on March 27, 2002 at 15:24


    Along the WAP standard of the 12 July 2001, Wireless Identity Mobile, p.8 chapter 1, paragraph 6 and 8:

    A basic requirement for WIM implementation is that it is tamper-resistant...Regular mobile phones and PDAs cannot be considered tamper-resistant. For these devices, e.g. extracting information from the module may be difficult but still feasible with a proper equipment.

    PKI functionality can be implemented in pure software in normal PDAs and mobilephones, using password authentification etc. However such implementations cannot be considered as WIM implementations.

    The question is: Will Nokia build some day WIM module in the mobilephone i.e. the handset includes a WIM module and customer then still needs only to add a SIM card.

    Problem in m-commerce is choose between either "Dual-Chip ala Mobey Forum-model" or "One-Chip trusted-operator-model".

    Build-in WIM would solve this problem.
    Thank you beforehand for your answer.

  2. #2
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    RE: WIM functionality; dual-chip vs single-chip vs build-in-WIM

    Posted by Forum Nokia Developer Support,
    on March 28, 2002 at 13:02

    Hello!

    Current Nokia phones support SWIM (WIM on SIM) implementation. In the future, one implementation model for security modules can also be a Dual Chip approach. This means that a second separate SIM-sized smart card containing the security module is placed semi-permanently in the phone. It is removable and issued independently of the SIM card, e.g. by a mobile commerce service provider. Its strength is that it separates the network subscription from the other applications, thus creating more latitude in terms of business models. Naturally, this requires phone designs that have the possibility of storing two SIM-sized cards and none of the Nokia phones currently in the market has this functionality.

    Kind regards,
    Forum Nokia Developer Support

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