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martyndaviesOffline
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Posted: Mar 21, 2007 - 04:55 PM Reply with quote Back to top
Solera explain their approach to CALEA call tapping in Details Reveal the Devil in CALEA in VOIP News.

Quote:
"We are a full packet capture appliance," explains CTO Bryan Sparks. "If somebody puts us on a network and says capture data as a default without applying some kind of capture policy, we would capture everything that is shown to our box. We stream that to disk, and once the disk becomes full for the first time we eat the oldest.


Then when the authorities get interested in a particular user, they can extract the already-recorded data from the box.

It seems to me that if the device is always recording, there is the tantalizing possibility that the feds could access material recorded even before the time and date that the judge authorized the call tap. The lawyers are going to love that.
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ianplainOffline
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Posted: Mar 21, 2007 - 06:14 PM Reply with quote Back to top
ah the devils in the detail though.

Code:
we would capture everything that is shown to our box.
and on a switched network that can be a lot or nothing at all.

With IP being peer to peer your average ISP/ITSP isnt going to want to proxy all traffic that usies its service.

Ian
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deanOffline
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Posted: Mar 21, 2007 - 06:44 PM Reply with quote Back to top
Quote:
With IP being peer to peer your average ISP/ITSP isnt going to want to proxy all traffic that usies its service.


The Law enforcement agencies are not as interested in the content as they're interested in the call data records (had an interesting chat with ITSPA about this very subject today).
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ianplainOffline
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Posted: Mar 21, 2007 - 06:56 PM Reply with quote Back to top
Same as in the mobile world then.
I think the US feds wanted the lot though ? I may be wrong
Ian
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