Anonymous Video on Demand

[Perry E. Metzger]

Jim Miller says:
> The Customer and the Video Provider engage in a protocol so that the  
> Customer ends up receiving 100 compressed and encrypted videos, only one  
> of which the Customer can successfully decrypt (and uncompress).

Can't work. As a mental proof of this, consider -- if such an
algorithm did exist, the customer could record the 100 inputs and feed
them to the algorithm 100 times, thus getting all 100 videos.

Perry