Re: [infoguys-list] Re: Is this plausible? Manipulating VHS tape
- Thanks for the idea, Sam! I'm keeping a little list of
alternatives to see which pans out best. And there's
always future stories . . . :-)
After corresponding (by e-mail) with a person at a
security technology company and bringing up some
points people on this list mentioned, I believe I've
been able to manipulate the original scenario to get
around the problems brought up about it so far(for
instance, a system with GEN Lock evidently gets around
one of the "noise/roll" problems Andy brought up). Of
course, I may run into future problems, so I
appreciate the various responses I've been getting.
--- liusiguang <liusiguang@...> wrote:
> Dr. Peg,
> How about the bad guy installing a splitter so the
> same video signal
> is sent to a second VCR, with a different date.
> This could be
> his 'alibi' tape, when marked and substituted for
> the original...
> Sam Norris AKA Liu Si Guang
> --- In email@example.com, Peg Daniels
> > --- A Grudko <agrudko@i...> wrote:
> > >
> > > -Original Message-
> > > From: Peg Daniels [mailto:drpeg2003@y...]
> > > > So the main thing I'm checking is whether such
> > > manipulation in the
> > > recording could remain undetected by an amateur
> > > viewing the tape in this
> > > way.
> > >
> > > There will usually be visible transitions (a
> > > blank scan line or roll)
> > > at the point there the edit starts and stops. To
> > > untrained eye it might
> > > not be too obvious PROVIDING the recorder is in
> > > condition and the tape
> > > fairly new, because;
> > >
> > Thanks for that extremely informative explanation,
> > Andy -- I greatly appreciate knowing the hows and
> > whys. Except now it looks like I have to junk that
> > little scenario :-) Well, fortunately this is
> > nothing written on stone, yet. Perhaps I'll have
> > arrange things so the entire 24 hrs. is replaced
> > the tape, so there are no editing starts and
> > Well, I'll think of something!
> > Anyway, thanks for saving me from writing
> > "stupid."
> > Best wishes,
> > Peg Daniels
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