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A covert communication method via spreadsheets by secret sharing with a self-authentication capability

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Fig. 1. Illustration of proposed covert communication method via spreadsheets by secret sharing
Fig. 2. Examples of spreadsheets. (a) Microsoft Excel. (b) Google Docs.
Fig. 3. A cover spreadsheet with 300 numeric items of students’ test scores. (a) List of the first 36 items in the spreadsheet
Fig. 6 shows a modified stego-spreadsheet where items 16 through
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