If you have an Excel spreadsheet that contains empty data, such as empty rows or columns, and plot a graph from the spreadsheet, Excel plots all empty data. Microsoft Excel 2010 does not plot hidden ...
For most people, steganography is overkill. If you do need it, though, OpenPuff is the way to go. Steganography, or hiding messages in plain sight, is a storied practice dating back to ancient Greece.
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