Talk:Um interface

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Latest comment: 15 years ago3 comments2 people in discussion

This is the starting point for a mode complete description of GSM's air interface. It is a work in progress. DavidABurgess (talk) 16:55, 27 October 2008 (UTC)Reply

We could use a section on Um security features. DavidABurgess (talk) 02:58, 29 November 2008 (UTC)Reply

two things:

• A5/2 is no longer implemented in recent MS I think. (see the A5/2 page and I checked on my iPhone, A5/2 doesn't work)
• I think the authentication process can be encrypted by using the previous encryption get. During the ___location update request, the key sequence number is given and if it matches with the network they can use the previous session key.

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Just a minor thing: According to 3GPP TS 05.01 V8.9.0 the guard period of 8,25 symbol time durations is at the end of a time slot. doesn't make a big difference unless you want to design a radio interface...

regards, MiKa from Vienna —Preceding unsigned comment added by 178.191.170.51 (talk) 20:17, 20 July 2010 (UTC)Reply