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Sylvain Munaut 246tnt at gmail.comHi, > 1) Issue our own SIM cards to permit Authentication + Encryption. This is > the perfect way how we can have a A5/1 based network that people can use > to play with airprobe + Kraken - without violating any laws. I was planning to enhance pySim to allow more batch programming and support for pc/sc reader (so you just have to insert, wait, remove, insert, wait, ...). I will probably do that soon, after DeepSec. > I would suggest we simply sell them (as opposed to providing > them for a deposit, as we then would have to take back a lot of cards and > return money, which is a lot of overhead). Definitely. I don't see any people having a problem with paying a few EUR for a SIM. Should : - Personal SIM with IMSI/KI/algo specified - Personal/official SIM with just known IMSI be allowed as well ? > 4) Consider putting all BTS in the same location area I didn't see the logs / analysis from last year, but : - Was the 'location' feature really exploited for something ? - Was paging a limit ? (if all are in the same area, the number of paging request would triple I guess). - What was the usage of sdcch/8 / TCH ? Would TCH/H with AMR be useful ? (i.e. was tch a limit ?) > 6) User registration > > So we sell SIM cards with a pre-programmed IMSI + Ki, but how do we > enable users to assign a phone number to them? Ideally I would want > them to simply register a phone number at the eventphone.de GURU > web interface ahead of the event. But how do we match the IMSI and > the phone number? Ask users to simply state the phone number they > registered? How do we get some kind of authentication? Well, I guess SMS is the easier. What kind of control can you have on the eventphone.de interface ? Each SIM has a 'default' number, and if they want to instead use a number they pre-registred, have them text a 'token' (long enough not to guess a valid one, but not too long as to be annoying). That token is just displayed on eventphone.de when they register a number as 'GSM' without an IMSI. Other option is IMEI. They put the IMEI on evenphone.de and when we get a registration we know who to link. Cheers, Sylvain