13 Apr
2010
13 Apr
'10
9:07 p.m.
Hi Jake (and others),
On Tue, Apr 13, 2010 at 10:09:52AM -0700, Jacob Appelbaum wrote:
see attachment.
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
I've
written an introductory text on GSM mobile phone architecture,
and before officially posting/announcing it, I thought I'd invite
the members of this list to do some review and give feedback!
Do you have the latex available? It's hard to edit and send a diff of a
pdf... 
14 Apr
14 Apr
12:34 p.m.
New subject: Request for review: GSM phone hardware introduction
On 2010-04-13 21:07:08, Harald Welte wrote:
Hi Jake (and others),
On Tue, Apr 13, 2010 at 10:09:52AM -0700, Jacob Appelbaum wrote:
>> I've written an introductory text on GSM mobile phone architecture,
>> and before officially posting/announcing it, I thought I'd invite
>> the members of this list to do some review and give feedback!
>>
> Do you have the latex available? It's hard to edit and send a diff of a
> pdf...
>
did you omit qualcomm in your list of baseband manufacturers
intentionaly? because it produces mostly cdma and 3g chipsets, and not gsm?
i have several additions to your document:
== in the list in subsection{MCU peripherals}
\item Audio routing, selecting how audio is routed in the phone, between
AP, BB, carspeaker,headset, mediaspeaker, phonespeaker and microphone
== addition to \subsection{The Digital Baseband (DBB)}
The baseband MCU usually runs a realtime operating system(RTOS), like
nucleus,
vxworks, or l4k.
== a subsection in section{Miscellaneous Topics}
\subsection{Security features}
There are several things that need protection against tampering in a gsm
phone, the
Ki ( the secret key which identifies the subscriber to the network ), the
IMEI ( the hardware id of the phone ), and various restrictions set by
your cellular provider
(commonly known as 'the simlock'). The Ki is stored in the SIM, and is
never handled by the baseband software directly, it cannot be read from
the SIM.
The IMEI on the other hand is just an arbitrary string stored in flash,
usually
obfuscated in some way, to make it more difficult to change. But there is no
special hardware ( like a SIM ) involved in protecting it.
willem
11:14 p.m.
New subject: Request for review: GSM phone hardware introduction
On Wed, Apr 14, 2010 at 12:34:36PM +0200, willem wrote:
On 2010-04-13 21:07:08, Harald Welte wrote:
yes, that's why I ignored Qualcomm.
Hi Jake (and others),
On Tue, Apr 13, 2010 at 10:09:52AM -0700, Jacob Appelbaum wrote:
>> I've written an introductory text on GSM mobile phone architecture,
>> and before officially posting/announcing it, I thought I'd invite
>> the members of this list to do some review and give feedback!
>>
> Do you have the latex available? It's hard to edit and send a diff of a
> pdf...
>
did you omit qualcomm in your list of baseband manufacturers
intentionaly? because it produces mostly cdma and 3g chipsets, and not gsm? i have several additions to your document:
thanks!
== in the list in subsection{MCU peripherals}
\item Audio routing, selecting how audio is routed in the phone, between
AP, BB, carspeaker,headset, mediaspeaker, phonespeaker and microphone
good point - though a lot of complexity is only required in the
smartphone case.
== addition to \subsection{The Digital Baseband
(DBB)}
The baseband MCU usually runs a realtime operating system(RTOS), like
nucleus, vxworks, or l4k.
i've added it, but to the software architecture part.
== a subsection in section{Miscellaneous Topics}
thanks. I've rewritten this entirely and added a number of security
related sub-sections to the document.
Please find the new version v0.3 attached.
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
15 Apr
15 Apr
12:22 p.m.
New subject: Request for review: GSM phone hardware introduction
Hi,
* Harald Welte <laforge(a)gnumonks.org> [2010-04-15 11:21]:
On Tue, Apr 13, 2010 at 10:09:52AM -0700, Jacob
Appelbaum wrote:
see attachment.
Very interesting read, thanks a lot!
Attached is a very small patch.
Cheers
Nico
I've
written an introductory text on GSM mobile phone architecture,
and before officially posting/announcing it, I thought I'd invite
the members of this list to do some review and give feedback!
Do you have the latex available? It's hard to edit and send a diff of a
pdf...
2:46 p.m.
New subject: Request for review: GSM phone hardware introduction
On Thu, Apr 15, 2010 at 12:22:54PM +0200, Nico Golde wrote:
Hi,
* Harald Welte <laforge(a)gnumonks.org> [2010-04-15 11:21]:
thanks, I've fixed those typos.
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
On Tue, Apr 13, 2010 at 10:09:52AM -0700, Jacob
Appelbaum wrote:
see attachment.
Very interesting read, thanks a lot!
Attached is a very small patch. I've
written an introductory text on GSM mobile phone architecture,
and before officially posting/announcing it, I thought I'd invite
the members of this list to do some review and give feedback!
Do you have the latex available? It's hard to edit and send a diff of a
pdf...
5127
days inactive
5129
days old
baseband-devel@lists.osmocom.org
4 comments
3 participants
participants (3)
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Harald Welte -
Nico Golde -
willem