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From: Brimstone on 31 Mar 2010 06:18 "Big Les Wade" <Les(a)nowhere.com> wrote in message news:TE6aauOB5xsLFwFA(a)obviously.invalid... > Adrian <toomany2cvs(a)gmail.com> posted >>Big Les Wade <Les(a)nowhere.com> gurgled happily, sounding much like they >>were saying: >> >>> Here's another today: >> >><chuckle> >>You beat me to it, Les... > > The thing is, there are probably 100 such cases that never get reported > for every one that does. Loads of employees in the education and social > care sector take files home on memory sticks, or collect it via remote > email. You can't get them to take it seriously, because they (usually) > don't suffer the consequences of a breach. My wife used to do it, and > would simply laugh at me when I advised her against it ... "oh don't be > such a nerd you're always fussing about that stuff, everybody does it ..." > Exactly, people have no respect or consideration for people they don't know.
From: Cynic on 31 Mar 2010 07:27 On Wed, 31 Mar 2010 08:36:12 +0000 (UTC), boltar2003(a)boltar.world wrote: >I'm not an expert on cameras but I have seen a laser damage one. It must have been something with a bit more oomph than the normal <5mW pointers. > And the >sun can't be a complete death zone for cameras or no one would ever be able >to take photos with it in. Most film cameras may be pointed at the Sun because the mechanism is such that until you operate the shutter, the image is not focussed onto anything opaque, and the shutter is only open for a fraction of a second when you do operate it. A CCD camera is a different thing altogether, because there is no shutter and so the image is continuously focussed onto the CCD while the lens cap is off. Taking a photo of a setting or rising Sun is OK because the atmosphere has attenuated the rays sufficiently that it won't do damage very quickly. But point most digital cameras at the Sun for longer than a few seconds at any other time, and your camera will be ruined. TV camera operators operating outdoors are warned not to leave a camera on a tripod where the Sun may move into its field of view. -- Cynic
From: Albert T Cone on 31 Mar 2010 07:34 boltar2003(a)boltar.world wrote: > On Tue, 30 Mar 2010 10:45:27 +0100 > Bod <bodron57(a)tiscali.co.uk> wrote: >>>> Still, its not hard to burn out a the CCD in a camera with a well aimed >>>> laser >>>> pointer.... >>> Hmm... tell me more...? >>> >>> >> Yes, tell us what power laser is required and how long to point it at >> the beast! :) > > Well obviously I've never tried it on a CCTV camera (though I've been sorely > tempted) but I know a halfwit aquaintance who wanted to see what would happen > to his pocket camera if he tried it. He found out pretty quick. Even the sun > can damage out some cameras if you point them at it for too long. A laser pointer can /theoretically/ damage a CCD element, but in practice, it's quite difficult. I work with lasers ranging from 1mW HeNe tubes through 4W solid-state lasers to a 50W CO2, and high-energy pulsed YAg beasts, and I do the majority of my sensing using CCD and CMOS detectors. The pulsed YAg and the CO2 can easily kill detectors, but then you can use them to drill holes in 1mm sheet steel if you choose to(!) I would estimate that anything less than a 50mW diode laser would be unlikely to damage an uncooled CMOS sensor, even if you mounted it rigidly and left it exposed indefinitely. A cooled sensor is limited largely by the cooling system, but I would estimate that you could tolerate anything up to a Watt or so. You *can* buy 100mW laser pointers (although I recommend you don't - even glints from glass surfaces will leave nice holes in your retina), but I think that in practice you would need an unfeasibly steady hand in order to direct one at a CCTV camera for long enough to damage the sensor, and even then the damage tends to be localised to the exposed pixels, so it's probably not the great piece of anarchy you might hope...
From: Mike P on 31 Mar 2010 08:02 On 31 Mar, 09:59, Adrian <toomany2...(a)gmail.com> wrote: > "Ophelia" <Ophe...(a)Elsinore.me.uk> gurgled happily, sounding much like > they were saying: > > > Dear G*d!!! And still they expect us to trust them:( -- > > More worrying still - many people DO, implicitly. I am aware it's a serious security breach, but what exactly can the data on this memory stick be used for. A bit of ID fraud perhaps, but I don't see what other dangers it poses. Am I just being naive? For example, I can't see what a paedophile could do with it.... kids are everywhere, so having a list of them is neither here nor there AFAICT..
From: boltar2003 on 31 Mar 2010 08:45
On Wed, 31 Mar 2010 12:27:48 +0100 Cynic <cynic_999(a)yahoo.co.uk> wrote: >On Wed, 31 Mar 2010 08:36:12 +0000 (UTC), boltar2003(a)boltar.world >wrote: > >>I'm not an expert on cameras but I have seen a laser damage one. > >It must have been something with a bit more oomph than the normal <5mW >pointers. No , was a pointer. I dunno , perhaps he was mistaken in thinking the camera was bust. *shrug* >Most film cameras may be pointed at the Sun because the mechanism is >such that until you operate the shutter, the image is not focussed >onto anything opaque, and the shutter is only open for a fraction of a >second when you do operate it. A CCD camera is a different thing >altogether, because there is no shutter and so the image is >continuously focussed onto the CCD while the lens cap is off. So in other words all we need is a sunny day and a good mirror and its bye bye CCTV camera ;) B2003 |