Comments on: Have they forgotten about PKC’s and SSL? http://ursecta.com/wp/2005/07/have-they-forgotten-about-pkcs-and-ssl/ J. Martin Wehlou on Security, Software Development, and Medicine Tue, 06 Jan 2009 23:32:55 +0000 http://wordpress.org/?v=2.6.2 By: Martin http://ursecta.com/wp/2005/07/have-they-forgotten-about-pkcs-and-ssl/#comment-16 Martin Thu, 07 Jul 2005 10:47:11 +0000 http://ursecta.com/wp/?p=12#comment-16 But as soon as you need software to verify the watermark, you're in the same situation as with digital signatures. And, since the watermark is actually a digital signature on the image, you've signed the image, not the email contents. That is, more complicated technology of the same kind with less result. But as soon as you need software to verify the watermark, you’re in the same situation as with digital signatures. And, since the watermark is actually a digital signature on the image, you’ve signed the image, not the email contents. That is, more complicated technology of the same kind with less result.

]]> By: nevelsteen http://ursecta.com/wp/2005/07/have-they-forgotten-about-pkcs-and-ssl/#comment-15 nevelsteen Thu, 07 Jul 2005 10:37:54 +0000 http://ursecta.com/wp/?p=12#comment-15 The image idea does bring to mind the concept of watermarking. Not that it would prove any more useful than digital signatures and proper SSL. But, if a watermark were to be embedded in another picture, it makes me wonder if a functionality similar to that of the anti-OCR images generated as human only readable could not be produced. Also a machine decipherable embedded watermark might prove effective (until the bad guys figure out how to read and produce those). Just thinking out loud here. The image idea does bring to mind the concept of watermarking. Not that it would prove any more useful than digital signatures and proper SSL. But, if a watermark were to be embedded in another picture, it makes me wonder if a functionality similar to that of the anti-OCR images generated as human only readable could not be produced. Also a machine decipherable embedded watermark might prove effective (until the bad guys figure out how to read and produce those).

Just thinking out loud here.

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