>[Moderator's note: I was under the impression most base stations did
>the crypto in hardware, so the answer would be "no, no performance
>gain" for such equipment. Besides, the main concern would be open
>channels, not CPU load. Anyone know better? --Perry]
It's my understanding that functions l
On Mon, 17 Sep 2001, Greg Rose wrote:
> There is one very simple reason why they might have wanted the encryption
> switched off. Wiretapping at the base station requires a wiretap order,
> whereas sniffing the airwaves in a matter of national security is something
> the NSA is allowed to do (
Peter Fairbrother <[EMAIL PROTECTED]> writes:
> Incidently, even the A5/1 algorithm is supposedly not very secure against eg
> LEAs, Corporations, or perhaps even a very dedicated amateur, though I have
> no exact details to hand.
A normal PC with several hundred gigabytes of disk space and two w
At 01:53 AM 9/17/2001 +0100, Peter Fairbrother wrote:
>It is possible that damage to basestations or volume of traffic may have
>caused this failure. Possibly, the telco switched it off to maintain
>service. Equally, the FBI/NSA etc may have switched it off, but I don't know
>why they would bother
> Angelos D. Keromytis wrote:
[...]
> Most of the day I was around 116 Street (Columbia U. campus), but at around
> 7pm I went to West 4 Street (they hadn't closed that part off yet), and the
> problem persisted.
>
> Just to clarify -- the phone was working, but the encryption was off (I
> suppos
At 06:56 PM 9/16/2001 -0400, t byfield wrote:
>[EMAIL PROTECTED] (Thu 09/13/01 at 02:57 PM -0700):
>
> > > An interesting bit of information: on Tuesday afternoon, to the extend
> > > that cellphones operated, GSM encryption was turned off throughout
> > > Manhattan. My GSM phone would repeatedly
In message <[EMAIL PROTECTED]>, t byfield writes:
>
>i don't think the relationship was so clear.
>
>however, a very limited sample did suggest that single-band (i.e.,
>domestic) phones were working while, side by side, 'world' phones
>weren't.
The phone I was using is an Ericsson T39 ("world"
[EMAIL PROTECTED] (Thu 09/13/01 at 02:57 PM -0700):
> > An interesting bit of information: on Tuesday afternoon, to the extend
> > that cellphones operated, GSM encryption was turned off throughout
> > Manhattan. My GSM phone would repeatedly warn me of this on every call I
> > made (or tried to
At 07:59 AM 09/13/2001 -0400, Angelos D. Keromytis wrote:
>An interesting bit of information: on Tuesday afternoon, to the extend that
>cellphones operated, GSM encryption was turned off throughout Manhattan. My
>GSM phone would repeatedly warn me of this on every call I made (or tried
>to make).
An interesting bit of information: on Tuesday afternoon, to the extend that
cellphones operated, GSM encryption was turned off throughout Manhattan. My
GSM phone would repeatedly warn me of this on every call I made (or tried
to make). As of Wednesday morning, things were back to normal.
Does an
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