On Wed, 6 Apr 2011 23:41:57 +0200 "julien.voisin" <[email protected]> wrote:
> >What file formats do you intend to support initially? > >I think PDF, images, audio and video files are the most important to > >support to start with. What do you think? > I think I'll focus on : > - pdf > - mpeg audio > - ogg > - bmp/gif/jpeg/png > - exe > - archives (bzip2, zip, tar) How do you plan to anonymize ‘exe’ files? The machine code in a compiled program often contains information about the compiler which produced it, so scrubbing off the clearly marked metadata is not sufficient. Similarly, audio, video, and image data captured by a hardware device can often be linked to other data captured by the same device, and files in formats that use lossy compression are also likely to contain subtle fingerprints of the compressor which produced them. Do you plan to research and develop tools that try to remove those fingerprints? (A tool which simply scrubs off the explicitly provided metadata would still be useful to experts, but it would need to warn users that the resulting files may still contain fingerprints which could link them to the users' devices and/or software configuration and to other previously published files which contain ‘personally identifying information’ or intact metadata.) Robert Ransom
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