Watermarking slices stored in a dispersed storage network
View Patent ↗A method begins by a processing module receiving data for storage in a dispersed storage network (DSN) memory and obtaining watermarking information regarding a source of the data. The method continues with the processing module dispersed storage error encoding the data to produce a plurality of sets of encoded data slices and processing the plurality of sets of encoded data slices and marker slices to produce a plurality of sets of watermarked encoded data slices to have a pattern of encoded data slices and the marker slices in accordance with the watermarking information. The method continues with the processing module outputting the plurality of sets of watermarked encoded data slices to the DSN memory for storage therein.
1. A dispersed storage (DS) module comprises:
a first module for facilitating receiving data for storage in a dispersed storage network (DSN) memory;
a second module for obtaining watermarking information regarding a source of the data;
a third module for dispersed storage error encoding the data to produce a plurality of sets of encoded data slices;
a fourth module for processing the plurality of sets of encoded data slices and marker slices to produce a plurality of sets of watermarked encoded data slices to have a pattern of encoded data slices and the marker slices in accordance with the watermarking information; and
a fifth module for facilitating outputting the plurality of sets of watermarked encoded data slices to the DSN memory for storage therein.
2. The DS module of claim 1 further comprises:
a sixth module for generating marker slices in accordance with the watermarking information by accessing a marker slice list of a plurality of marker slices to retrieve the marker slices; or
the sixth module for generating marker slices in accordance with the watermarking information by:
retrieving watermarking data and watermarking error coding dispersal storage parameters; and
error encoding the watermark data based on the watermarking error coding dispersal storage parameters to produce the marker slices.
3. The DS module of claim 1 , wherein the third module dispersed storage error encodes the data further by:
error encoding the data in accordance with the watermarking information, wherein the watermarking information includes at least one of:
a watermarking pattern indicator;
error coding dispersal storage function parameters; and
one or more error coding generator matrixes.
4. The DS module of claim 3 further comprises:
the third module for dispersed storage error encoding the data in accordance with the error coding dispersal storage function parameters to produce the plurality of sets of encoded data slices; and
the fourth module for processing the plurality of sets of encoded data slices and marker slices by replacing encoded data slices of the plurality of sets of encoded data slices with marker slices in accordance with the watermarking pattern indicator to produce the plurality of sets of watermarked encoded data slices.
5. The DS module of claim 3 further comprises:
the third module for dispersed storage error encoding the data in accordance with an error coding generator matrix of the one or more error coding generator matrixes to produce the plurality of sets of encoded data slices; and
the fourth module for processing the plurality of sets of encoded data slices and marker slices by inserting marker slices into gaps of the plurality of sets of encoded data slices in accordance with the watermarking pattern indicator to produce the plurality of sets of watermarked encoded data slices.
6. A dispersed storage (DS) module comprises:
a first module for facilitating receiving a data retrieval request for data stored as a plurality of sets of watermarked encoded data slices in a dispersed storage network (DSN) memory;
a second module for obtaining watermarking information associated with the data;
a third module for facilitating retrieving the plurality of sets of watermarked encoded data slices from the DSN memory;
a fourth module for identifying marker slices of the plurality of sets of watermarked encoded data slices;
a fifth module for determining whether the marker slices are in accordance with the watermarking information; and
a sixth module for dispersed storage error decoding a plurality of sets of encoded data slices of the plurality of sets of watermarked encoded data slices to reproduce the data when the marker slices are in accordance with the watermarking information.
7. The DS module of claim 6 further comprises:
the fifth module for indicating a potential authentication issue regarding the storage of the data when the marker slices are not in accordance with the watermarking information.
8. The DS module of claim 6 , wherein the fifth module determines whether the marker slices are in accordance with the watermarking information by:
detecting a pattern of the marker slices and the plurality of sets of encoded data slices of the plurality of sets of watermarked encoded data slices; and
determining whether the pattern compares favorably to a watermarking pattern of the watermarking information.
9. The DS module of claim 6 , wherein the fourth module identifies marker slices by:
decoding the plurality of sets of watermarked encoded data slices in accordance with dispersed storage error coding parameters using different combinations of marker slices and encoded data slices of a set of the plurality of sets of watermarked encoded data slices to identify potential maker slices; and
validating the potential marker slices in accordance with the watermarking information to produce the marker slices.