Question: The copy protection originally designed to protect content on DVDs has been overcome some years ago. What other methods can you find today that movie studios are using to protect their content on DVDs or other optical media?
Answer: The first big one I found is CSS, which uses keys to allow DVD information to be translated and therefore copied. This was cracked however back in 1999 by people who use reverse engineering of the algorithm. The DVD Copy Association created this as well as the RPC, regional playback control, which the movie studios use to control the geographical and overall distribution of the products that they create. This one has been controversial though as there is likely some obvious profiling of different geographic areas involved. The current most popular, widely-used, and useful form of protecting against DVD copying is AACS, Advanced Access Content System, which protects against DVD copying and now, as of 2005, against HD DVD and Blu-Ray copying as well. Of course, just as always, people are certainly working hard to crack this and enable the continued piracy of Hollywood movies and studios will have to perpetually fight to earn and preserve what they deserve.
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It's not a lot different than the "game" we considered with regards to kids and proxy servers in schools. It's a catch-up game.
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