Security Framework for Pervasive Healthcare Architectures Utilizing MPEG-21 IPMP Components

Figure 9

An example view of an MPEG-21 IPMP container which contains three items—one not protected and two protected with the use of a cryptographic tool that is remote referenced at the location urn:IPMP_Tools:ToolServer:ToolSymEnc08. Before the user decrypts the contents, he must decrypt the license that accompanies the content, which will provide to the user the decryption key and usage rules of the content. The license is binded to a specific user and it is included into the item encrypted using a public-key algorithm; in our implementation, we used RSA [11], and the license has been encrypted using the users' public key. For the creation of the aforementioned MPEG-21 IPMP-based file, we have used the AXMEDIS editor [12].