Sony Ericsson Mobile Communications Ab

Markus Liwell

Stefan Mikael Andersson

The invention relates to a method for distributing content to a mobile device using a digital rights management (DRM) scheme, adapted for the case when files are exchanged over an external memory or over a serial connection between a computer (PC) and the mobile device, and a mobile device (ME) adapted therefor. The mobile device creates a request file (RORe-questrop) comprising information necessary for forming a rights object file. On the computer side, the request file is retrieved and a response file is sent back to the mobile device including the encrypted content (Contentdcf) and a rights object file (Content.ro). The mobile device receives the response file and decrypts and stores the content. The files may be exchanged over a DRM folder, arranged in the mobile device and accessible by the computer in mass storage mode, or the DRM folder may be arranged in an external memory (MS) alternately accessible by the mobile device and the computer.

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Malmo, Sweden

Markus Liwell