Buckinghamshire CC ANPR cameras
bdm at fenrir.org.uk
Wed Jan 11 11:18:04 GMT 2012
On Wed, 11 Jan 2012 08:27:02 +0000
Mark Lomas <ukcrypto at absent-minded.com> wrote:
> I remember a police officer explaining the investigation of a kidnapping.
> The kidnappers used a PAYG phone that was only switched on while making
> ransom calls, never used to call any other phones, and taken to a new
> location each time it was used. Consequently neither an intercept nor
> traffic analysis would reveal information the police didn't already have.
> Instead the police took the lists of all other phones in the same cells at
> the times of the calls (the data James mentioned) and looked for phones
> that were nearby on more than one occasion.
So the disciplined kidnapper needs to ensure that any personal phones
are switched off and that they have a number of other PAYG phones to
use for other calls which they dispose of carefully after use and
have only topped up with cash at places without CCTV.
bdm at fenrir dot org dot uk
"Arguing with an engineer is like wrestling with a pig in the mud;
after a while you realize you are muddy and the pig is enjoying it."
GnuPG key ID DE32E5C5 - http://wwwkeys.uk.pgp.net/pgpnet/wwwkeys.html
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