| 摘要 |
The invention relates to a device (10) for hiding information in a text. Sai d device comprises means (18) for linguistically analyzing the text to produce text components, means (20) for determining a plurality of formulation alternatives for the text by varying the order of the text components and optionally additionally by using synonyms for said text components. Every formulation alternative is grammatically correct for the text and has essentially the same meaning as the text. Certain partial information is allocated to every sequence and/or to every synonym or to every paraphrase. The device further comprises means (22) for selecting a formulation alternative from the plurality of formulation alternatives in such a manner that the partial information that is allocated to the selected formulation corresponds to the information to be hidden. The inventive device also encompasses means (24) for outputting the formulation alternative that forms a modified text, said modified text containing information to be hidden. A device for extracting breaks the modified text down into its text components and uses the partial information allocated to said text components to extrac t the hidden information. The inventive device and method provide a means for flexibly and inconspicuously introducing large amounts of information to be hidden into any text. |
