3 expanded posts ยท every known parent and child
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What about doing steganography by embedding messages in random-dot stereograms?
-- Will
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-----END PGP SIGNATURE----------BEGIN PGP SIGNED MESSAGE----- A long time ago (1 Dec), you wrote: >What about doing steganography by embedding messages in random-dot stereograms? Have you seen the code I uploaded to soda, to generate those stereograms? For that matter, I haven't been able to find the file(s) there myself. - Carl -----BEGIN PGP SIGNATURE----- Version: 2.4 iQCzAgUBLUgK4XjfNbIrNWRxAQGn2QTuNSBeHuL+uvnECBRhsAUFUVrt3OQJR3c8 vPN0MhADaKVYDa7FL/adgLxMN+oIn/8O7ESlEBDfgLZ7+1FceUG/hghiAy8MsoRf tPh0WzIHH4DZ2ZBjY0Nu3znuBxzniYnc4TQvQsk3xulFkHR1C3SuTdJwgpei2Ubn VgDRGyAbFB71bSJSGOOm3f4WtacKWJs5l1YLpku57a0HYYccpyQ= =bk6U -----END PGP SIGNATURE-----
I never did contact the author, but the stereogram code on soda had one major byte-order dependencies in the file format -- I cheated and just used emacs to twiddle the first four bytes of each of the data files, and was able to get it to work (nice thing about having a sun 3/50 at home -- 19" monochrome monitor that works *great* for these...) under linux. I've also seen code to generate ascii stereograms, but don't have it online (yes, I only saw it on paper) and don't have permission to post it in any case. The algorithm is simple, though, and the program could be done as a short perl script... I've never been clear on where to hide the data, though -- in the random background pattern? in something that is visible at a certain separation distance? (a friend had the admittedly odd suggestion of hiding one stereogram in another, by having the image you see with crossed eyes be a random dot pattern itself...) _Mark_ <eichin@paycheck.cygnus.com> ... just me at home ...