The law that resides at the heart of controversy over digital copyright management is the Digital Millennium Copyright Act of 1996 (DMCA).
The text of the law is on Wikisource, here.
There is a supplement called “Limitations of Liability Relating to Material Online,” section 512, Cornell link here (also called the “Online Copyright Infringement Liability Limitation Act” (OCILLA), or the “safe harbor” provision.
The law is controversial for a number of reasons. One is that manufacturers are forced to use the copy protection technology of one vendor (Macrovision). A totally unrelated controversy concerns the takedown provision. Web hosts are immune from copyright infringement liability if they follow takedown requests, and then have little incentive to challenge the legitimacy of infringement claims. There have also been DMCA-related requests to take down links to infringing material, and this is a legally gray area.
Another concern is that the DMCA can hinder the efforts of “newbie” artists to manufacture and distribute their own works for free or low-cost consumption. Some people feel that DMCA and related laws are intended to protect “entrenched media” from low cost competition.
A website called Chillingeffects keeps a log of DMCA “cease and desist” letters.
The Sonny Bono Copyright Term Extension Act of 1998 is here.
extends copyright terms for 20 years.
There have been several attempts to modify the law.
109th Congress.
These bills are “dead” but it is likely that similar ones will be reintroduced.
H.R. 4569: Digital Transition Content Security Act of 2005, to close an “analog” loophole and require certain analog devices to have copy protection.
Govtrack link.
H.R. 1201: The Digital Millennium Consumer Rights Act of 2005 (DMCRA) would refine the DMCA provisions and restore some ordinary “fair use” for consumers as was common previously with CD’s, cassettes, and vinyl phonograph records.
Govtrack here.
Some court cases:
Chamberlain v. SkyLink (DC Circuit Court of Appeals, 2004, here)
(may require registration), a case involving automated garage door openers
Universal v. Reimerdes, distribution of DeCSS, reverse engineering allowing decryption of DVDs. Trial court opinion (2001), here, was upheld in Second Circuit (resolved in favor of copyright holder)
U.S. v. ElcomSof and Skylaorv (criminal prosecution), Electronic Frontier Foundation reference.
Lexmark v. Static Control Components. Intervention of a printer’s microcontroller to allow other printer cartridges does not violate the DMCA (6th Circuit). Link here.
MGM et al. v. Grokster et. al (2005), opinion here.
The Supreme Court allows downstream liability for software vendors or service vendors when their “business model” is based on encouraging copyright infringement.
I have running news occasionally on this issue on my main blog (intermixed with many other issues), link.
A major attempt in the 108th Congress was S. 2560, “Inducing Infringement of Copyrights Act of 2004,” govtrack here.