| 主权项 |
1. A method for fingerprinting a data object having a nominal stream format F, to provide a fingerprinted data object, comprising the pre-fingerprinting and forensic luring process, wherein the pre-fingerprinting process comprises:
determining a first set of elements of an original data object (A) having each an original value, replacing each original value by an alternate value to create a modified data object that remains syntactically correct according to the stream format F but semantically different according to perceptive information carried by the original data object, regardless which alternate value (AV) was replaced, extending the modified data object with at least one supplementary object (Ss) to provide a fingerprinting-ready data object having the same nominal stream format F, comprising, for each element at least a first replacement value and a second replacement value said supplementary object (Ss) being inserted as Control Session Transport Packet (CSTP) into the fingerprinting-ready data object; and the forensic luring process comprises: extracting the supplementary object from the fingerprinting-ready data object, removing the Control Session Transport Packet (CSTP) from the fingerprinting-ready data object, obtaining an identifier to be associated with the fingerprinted data object, modifying the alternate values at positions in the first set of elements, and for each element, selecting one of the replacement values based on all or part of the identifier to create the fingerprinted data object. |
