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birding-aus
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birding-aus
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| To: | Peter Ewin <> |
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| Subject: | Fourth Fig Parrot |
| From: | Andrew Taylor <> |
| Date: | Thu, 21 Feb 2008 22:19:33 +1100 |
On Thu, Feb 15, 2007 at 06:52:51PM +1100, Peter Ewin wrote: > Is this true? I would have thought it is the format that a digital > photo is stored rather than the camera that allows alteration. And > that any photo can be scanned and then digitally altered afterwards. A digital camera could include a cryptographic signature with the image. allowing anyone to verify an image matches the accompanying signature and hence was taken with the camera. For an explanation look up "public key cryptography" in wikipedia. I haven't seen anything from Nikon, Canon, etc. This German manufacturer makes something for more specialist purposes. http://www.kappa.de/en/Products/Digital_Camera_Systems/ Might be hard to use for nature photgraphy. Andrew |
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