**Multimedia**

188 Cutting Edge Research in New Technologies

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**10** 

*Greece* 

**DRM & Security Enabling** 

*Industrial Systems Institute (I.S.I.)* 

**Mechanisms Leveraging User** 

**Centric Multimedia Convergence** 

Anastasios Fragopoulos, John Gialelis and Dimitrios Serpanos

There have been considerable efforts to have audiovisual multimedia systems and applications converge, in home environments with homes as spaces of convergence, and for nomadic users with advanced mobile devices as points of convergence. These trends are important but also have limitations that have to be addressed and overcome, i.e. homecentric systems fail to account for increased mobility and desire to provide continuous service across spatial boundaries outside the home; device-centric convergence, e.g. in 3G phones, supports nomadic use but provides a very limited user experience as no single device and interface will fit many different applications well; furthermore, in both cases there are a lot of different security aspects that arise and have to be taken in care. The trend in our era, is to move beyond home and device-centric convergence toward truly usercentric convergence of multimedia, where the user is acting as the point at which services (multimedia applications) and the means for interacting with them (devices and interfaces)

One of the biggest challenges that we are facing in the deployment of architectures in such environments is related to, on the one hand, the security and protection of digital contents that interchanged between users in such pervasive ubiquitous computing environments and on the other hand with the provision to the users with security mechanisms that allow them to perform secure transactions (e.g. authentication, privacy protection, secure data transfer, etc.) in those environments. Moreover protection of Intellectual Property (IP) is a necessity in modern multimedia architectures. The concerns of content creators for loss of revenues constitute a strong obstacle to the wide deployment of architectures that involve distribution of IP protected digital content. Today the end-users are equipped with different types of small devices that allow them to be the digital contents creators, thus creating digital content that wish to share with third parties. In most cases, the end-users would like to have mechanisms which would give them the possibility to protect the content which have created and possibly to set their own usage rights over it, thus specifying towards third

Digital Rights Management (DRM) mechanisms constitute of various technologies that have been developed and deployed by content providers, creators, distributors, in order to

**1. Introduction** 

converge.

users how their digital content shall be used.
