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Alfonso De Gregorio adg at crypto.lo.gyOn Tue, Mar 8, 2011 at 3:28 PM, Henk <henk.vergonet at gmail.com> wrote: > Actually comp128-2 has a 54bit Kc it seems. Have you observed a COMP128-2 implementation returning a 54bit long Kc?, or have you heard about this from somebody else? Can you please disclose more about the SIM model and the operator running this A3/A8 implementation? One more weakened key derivation function (after the first version) would be interesting per se. Still, it would be even more interesting to give a closer look at this obscure cipher we carry in our pockets... A programmable SIM with COMP128v2 would be valuable for a project I'd like to contribute. Cheers, alfonso > 246tnt at gmail.comschreef: > >>> On a related note, does anyone have any SIMs for sale, implementing >>> A3/A8 with COMP128-2, still to be provisioned with its Ki or already >>> provisioned with a known Ki? >> >>Comp128v2 ? >>I don't think so ... >> >>All the cards we have use COMP128 v1, the spec for v2 have not been leaked >>(yet ?). >> >>For those, you best bet is ebay, search for "super sim" / 16-in-1 / "magic >>sim" things like that. >>Dealextreme also has some. >> >>If you need more quantity, you can often contact those vendor directly and >>they'll be happy to send you a bunch. >>I myself bought a lot directly emailing the guys at magicsim.com >> >>Cheers, >> >>Sylvain > --