[vlc-devel] Ephemeral timeout not working on subpictures

[Rémi Denis-Courmont]

Le mardi 10 avril 2012 18:26:20 Peter Tap, vous avez écrit :
> The location is generated randomly all over the screen. Each frame shows
> the watermark on a different location. It will be very hard for the
> attacker to edit frame by frame.
> 
> The random number generator is the one that VLC provides (vlc_lrand48). I
> can see that the numbers are getting displayed at different location.

VLC provides an implementation of the POSIX 48-bits linear congruential PRNG, 
seeded with the system PRNG. This is not adequate for security-sensitive 
applications as the sequence may become predictible.

-- 
Rémi Denis-Courmont
http://www.remlab.net/
http://fi.linkedin.com/in/remidenis