From: Steve Schear <schear@lvdi.net>
Date: Tue, 27 Jan 1998 11:46:40 +0800
To: cypherpunks@cyberpass.net
Subject: Re: Signing video...
Message-ID: <v03102805b0f3080902ed@[208.129.55.202]>
MIME-Version: 1.0
Content-Type: text/plain



>Hi,
>
>I was exchangin idea with a couple of members off-list and an idea came to
>me about how to time stamp the frames. It would require a minor modification
>to the WWV transmission but it wouldn't be much. Have the WWV transmitters
>sign each 'tick' of the clock and have a WWV receiver in the vcr. This would
>allow time stamping the frame with a signed reference that could be checked.

Although this could reduce the cost and power consumption in the camera how
does this guarantee that the signature information wasn't inserted later.
With today's excellent digital postprocessing it could be very hard to
detect.

--Steve