Abstract
In recent years, due to rapid development of the network and communication technologies, the digital content (image, video, music or film) transaction is becoming faster and more convenient so that a huge market for digital content transaction is created. Although the developing communication technologies bring many conveniences, they also introduce two important problems for digital content transaction. The first problem is how to protect intellectual property rights of digital content and the second is how to protect the security of digital content transaction. The first problem derives from when the valued content is transferred to digital form, it can be easily duplicated and freely redistributed without any degradation. These unauthorized transfers of digital content will lead to the economical loss of rights holder. On the other hand, how to ensure digital content transaction is secure and protected so that merchant and purchaser can transact digital content without worrying about is the key point for vigorous development of digital content transaction.If hardware is the bone of digital world, then digital content is its blood. The first thing for developing digital content transaction is to protect the value of digital content and hence ensure its intellectual property rights. These can prevent the digital content from duplicating and redistributing by illegal user.Since the government to publicize the importance of intellectual property rights, the concept of embedding an identifier in digital content has gradually become accepted. Content ID is a new idea for protect intellectual property rights, in order to achieve safe distribution of digital content requirement that content should be persistently associated with unique identifiers (Ids). With the persistent association of Ids with digital content, Content ID can be used to prevent copy. Content ID can guarantee digital content identification over the world, thus can provide protection to intellectual property rights. The Content ID can help to reduce the concern that rights owners distribute their digital content over the digital environment that can foster a new type commerce-“digital content commerce”.Now day, have many organization discuss with Content ID. The cIDf (Content ID Forum) was established by Professor Dr. Hiroshi Yasuda at the University of Tokyo for the purpose of providing guard for copyright management. The main object of this forum is to standardize the “Content ID,” which is a set of well-defined metadata including a unique code embedded in each digital content for the purpose of copyright verification.The digital content transaction not only have rights problem but also have security problem. In the digital transaction environment (as internet), merchant and purchaser may not see each other, and never exchange any digital content hand by hand. For this reason, how to identifying and exchanging digital content in the digital environment become more important.For above reason, we hope to provide a digital content transaction system that can protect intellectual property rights and ensure secure digital content transaction. In this thesis, we improved Content ID Forum (cIDf) reference model by combined the Buyer-Seller watermark protocol, biometric verification and Java Card Mobile-Commerce Payment System with cIDf reference model.