A study on contents distribution using electronic cash system

Electronic cash systems are used as payment tools of e-commerce. They should be equipped with independence, transferability, and dividability, which are requirements of digital rights management (DRM) servicing contents. The contents can be recognized in terms of money. Its concept applies to reprint, copy, and anonymous users. This paper shows DRM model which adopted e-cash as a result of examining requirements of e-cash and DRM. The DRM introduces the hierarchical structure, and gives anonymity to the contents or users. Lastly, several methods proposed are examined, compared and analyzed.