In message <[log in to unmask]>, at 00:14:18
on Thu, 7 Jan 2016, Chris Pounder <[log in to unmask]> writes
>He also said the case for retention and bulk data collection was not
>explained fully (i.e. not made).
But he was only going on the 300 page document originally published, and
not even any of the previous evidence given to the Committee. It's not
really the role of that document to make the case for every clause - it
would be 500 pages or more if it tried.
Most of that case-making will emerge either in more written evidence
(the main tranche was published yesterday) in responses to the Joint
Committees report, and in Committee when the final Bill is being
debated.
One of the witnesses earlier this week was perhaps inadvertently making
quite a powerful argument for the retention (he also said the bulk
collection of Comms Data is already happening because of taps on fibre
connections, which is outside the scope of the CSP-based ICR regime).
My version of what he was saying harks back to a CCTV analogy. He
described the futility of having too much data being collected which
overwhelms the analysts, which would be equivalent to having public CCTV
cameras viewed in real time by armies of spotters.
But one of the more powerful uses of CCTV is to *record* it, so when you
realise that something needs investigating you can "rewind" and look at
a very focussed subset of the entire CCTV footage in the country. The
"filtering arrangements" are even more powerful in the sense that having
discovered (eg) which vehicles are of interest you could automatically
re-scan and run ANPR over, the CCTV recordings to highlight where a
specific vehicle had been seen.
Continuing the analogy, you might then see the bank robbers getting out
of the car into a different one, and then you try to follow that one
through the CCTV recordings instead.
--
Roland Perry
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