Why aren't known-plaintext attacks against digital media trivial ?
Peter Gutmann
pgut001 at cs.auckland.ac.nz
Fri Oct 16 21:57:44 PDT 2009
John Case <case at sdf.lonestar.org> writes:
>Let's say I am authoring a video clip for blu-ray. I have a scene
>transition that goes to solid black. Let's further say that the tool I am
>using allows me to insert such "screens" and I define them with hex color
>values ... so I simply say "fill screen with #000000 for 2 seconds".
>
>Which essentially turns into a display resulting in 1920x1080 pixels of
>that hex code. For 30-60 frames per second.
Which after compression turns into a handful of bytes, encoding (initially)
"big block of nothing" and then "same as before".
>Why aren't events like this huge sources of known-plaintext ?
See above.
Peter.
More information about the cypherpunks-legacy
mailing list