AW: Plans for GSM / OpenBSC field test at 27C3 - OpenBSC

27 Oct 2010

 
...
 > 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. 
ok, the other way around.  The token is a unique value that they have to SMS to
...
 OpenBSC... great idea.  I like it that way. 
i would like to ask eventphone to add a 10 digits token to the
registration tool. this way it is hard enough guess. the token shall be
generated randomly when not yet assigned to a phone number. the token is
used to authenticate:

- by sending SMS with the token (like said above)
- by dialing a service number and entering the token
- by giving the token to the GSM help desk.