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Re: Video & cryptography... (fwd)

Jim Choate wrote:
| > From: Adam Shostack <[email protected]>
| > Subject: Re: Video & cryptography...
| > Date: Mon, 26 Jan 1998 13:56:57 -0500 (EST)
| > Schneier, Wagner and Kelsey have done some work on an authenticating
| > camera.

Dave points out that this was Schneier, Hall and Kelsey.

| > One issue to be concerned with is that what the camera sees is not
| > always the truth.  Putting a film set together to film bigfoot is
| > easy.  The fact that the film is authenticated as having come from the
| > camera doesn't mean a whole lot in some cases.
| Doesn't this same sort of issue arise from any other digital signature
| process then? There should be nothing fundamentaly different between the
| characteristics of a video camera signing a frame than a person signing
| email.

	It arises in a different context; with a signature on paper,
you're generally indicating that you've read and consented to whats on
the paper, not that you created it.  The meaning of a camera signing a
video still is not obvious to me.  Is it intended to be 'this is what
we saw through the lens?' or 'this is what really happened?'


"It is seldom that liberty of any kind is lost all at once."