This study aims to consider a near future's figure of copyright system in the changing environment led by technological developments for multimedia and other digital exploitations of copyrighted works.
In respect of works, performances, phonograms, we are facing new types of exploitation through digital transmission or with DYD, flash-memory etc. and simultaneously new issues on interface between old and new media, for example, between digitization of broadcasting and digital transmission. Now, while the scope of digital exploitation such as music transmission, electronic publishing, digital broadcasting is expanding, it has been our urgent task to find out a new copyright protection system with a tight interface with technical means. In this respect, we have been in a position to consider international, foreign and national developments corresponding to WIPO Copyright Treaty and WIPO Performances and Phonograms Treaty of December 1996.
Consequently we could clearly recognize a possibility to establish a right management system supported by technical means of encryption, watermarking and so on. It is "Electronic Copyright Management System" combined with other systems such as electronic commerce, electronic certification, electronic payment. There it seems possible for us to talk about "electronic" exercise of copyright, "electronic" authorization of work exploitation.

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