This interesting system does not prevent people from copying, but rather, allows people to copy but requires that they imprint an authenticated digital signature 'watermarked' into the copy. This allows for all sorts of personal use, but "if content leaks out to the general public, e.g. through open file sharing systems, it can easily be traced back to its origin by analyzing the embedded digital signature." It's an elegant idea, but some people may worry about registering their identity with a central service. LWDRM recognizes this. As the article notes, "It is well known that the majority of users are reluctant to register with an electronic system trying to avoid persistent surveillance. For this reason LWDRM offers a step-by-step approach, which allows the user to benefit from the system even without registration."
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