A Study on the Permutation and Recombination Method Digital Contents for DRM in Smart Home Environment

The digital content services in home network provide a various kind of services such as cultural life and offer convenience, accessibility and effectiveness to users. But, digital contents are easy to be duplicated illegally and used fraudulent by malicious party which break down the development of digital content services in smart home environment. To protect digital contents from those problems, watermark or DRM (digital rights management) technique has been researched. The existing technique is only for a specific format, which do not have a universal feature. In addition, there is a technique using encryption algorithms to protect digital contents but the problem is when lots of digital contents are used, encrypting and decrypting times are extremely long to be processed. This research suggests the way on how to provide the digital contents service well in smart home environment. The proposed method using a partly decoded method of digital contents header and permutations recombination about separated contents are being used widely to provide DRM services on all kind of digital contents. And, it makes the process of encryption and decryption on digital contents faster and it includes the function to keep the existing security so it is very flexible for various kinds of digital contents.