Recent "Digital Copyright" Legislation: U.S. DMCA (Digital Millennium Copyright Act) The debates in the House and Senate preceding the signing into law of the DMCA by U.S. President Clinton in October 1998 indicated that the principal object of the Act is to promote the U.S. economy by establishing an efficient Internet marketplace in copyrighted works. The DMCA implements the two 1996 WIPO treaties (WIPO Performances and Phonograms Treaty and WIPO Copyright Treaty) and addresses a variety of issues that arose with the increased availability of content in digital form. The Act 1) creates a series of "safe harbor" defenses (which are subject to a variety of conditions that must be met) for certain common activities of ISPs (Internet Service Provider), 2) bars the circumvention of technological protection measures that protect copyrighted works, 3) prohibits the distribution or provision of false copyright management information with the intent to induce or conceal infringement, 4) establishes an exemption for making a copy of a computer program for purposes of maintenance or repair, and 5) contains provisions concerning the "webcasting" of sound recordings on the Internet and the making of (digital) copies of copyrighted works by nonprofit libraries and archives. A full-text version of the DMCA is available from: The Library of Congress: Thomas (Legislative Information on the Internet): http://thomas.loc.gov/cgi-bin/cpquery/z?cp105:hr796: Moreover the U.S. Copyright Office provides a memorandum, which briefly summarizes each of the five titles of the DMCA (pdf format): http://lcweb.loc.gov/copyright/legislation/dmca.pdf The DMCA has been criticized for not clarifying the range of legal principles on the liability of ISPs and creating exceptions to only some of the provisions; therefore giving copyright owners even more rights. Among the variety of comments on the DMCA are: Lutzker, Arnold P.: Primer on the Digital Millennium: What the Digital Millennium Copyright Act and the Copyright Term Extension Act Mean for the Library Community. http://www.arl.org/info/frn/copy/primer.html Lutzker & Lutzker law firm and the Association of Research Libraries: The Digital Millennium Copyright Act: Highlights of New Copyright Provision Establishing Limitation of Liability for Online Service Providers. http://www.arl.org/info/frn/copy/osp.html

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Optical communication system by Aeneas Tacitus, 4th century B.C. Aeneas Tacitus, a Greek military scientist and cryptographer, invented an optical communication system that combines water and beacon telegraphy. Torches indicated the beginnings and the ends of message transmissions while water jars were used to transmit the messages. These jars had a plugged standard-size hole drilled on the bottom side and were filled with water. As those who sent and those who received the message unplugged the jars simultaneously, the water drained out. Because the transmitted messages corresponded to water levels, the sender indicated by torch signal that the appropriate water level has been reached. It is a disadvantage that the possible messages are restricted to a given code, but as this system was mainly used for military purposes, this was offset by the advantage that it was almost impossible for outsiders to understand these messages unless they possessed the codebook. With communication separated from transportation, the distant became near. Tacitus' telegraph system was very fast and not excelled until the end of the 18th century. For further information see Joanne Chang & Anna Soellner, Decoding Device, http://www.smith.edu/hsc/museum/ancient_inventions/decoder2.html http://www.smith.edu/hsc/museum/ancient_inven...

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