Bonding contents on separate storage media
AssigneeThomson Licensing
InventorsDirk GANDOLPH, Jobst HOERENTRUP, Ralf OSTERMANN, Carsten HERPEL, Uwe JANSSEN, Hartmut PETERS, Andrej SCHEWZOW, Marco WINTER
Life of this patent
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Abstract
Local storage on player instruments provides the ability for adding further amendments and most recent supplements to the optical disc content. A problem arising with this technically applicable possibility is the protection of copyrights bound to disc and supplement data. The present invention describes a technique to ensure a security framework that is able to handle this, by creating a virtual file system (VFS) by merging optical disc data and local storage data based upon a common identifier.
Claims10
Method for binding first data from first removable read-only storage medium and second data from second storage medium, comprising the steps of
- determining from inserted first read-only storage medium first identifier (organization_ID), second identifier (disc_ID) and first data set (index file);
- receiving a command for starting an application;
- determining if on the second storage medium a first directory according to the first identifier (organization_ID), and under the first directory a second directory according to the second identifier (disc_ID) are available, and if so, then performing the following steps of
- reading from the second directory a second data set and extracting from the read second data set a list of files related to said application;
- determining that said related files are available either on the first read-only storage medium, or on the second storage medium under the first directory;
- generating a virtual file system (VFS) comprising said available related files;
- and
- starting said application based on the generated virtual file system (VFS).
Method according to the previous claim, wherein said files within the VFS are writable while the VFS does not exist.
Method according to any of the previous claims, wherein the second data set is certified by a signature file.
Method according to any of previous claims, wherein the related files that are located below the first directory, but not below the second directory, are certified by separate signed certification files.
Method for creating a virtual file system (VFS) with data from first removable read-only storage medium and data from second storage medium, comprising the steps of
- determining from inserted first storage medium first (organization_ID) and second (disc_ID) identifiers;
- determining if on the second storage medium a directory according to the first identifier (organization_ID) with a subdirectory according to the second identifier (disc_ID) is available;
- if not, creating on the second storage medium said directories;
- retrieving from the first storage medium or via Internet a file containing a list of files, and storing it under the second directory;
- and
- creating a virtual file system (VFS) according to the list of files.
Method according to any of the previous claims, wherein the virtual file system (VFS) is maintained only as long as the removable read-only storage medium is accessible, and otherwise removed.
Dependencies are inferred from the claim text.