1. A method for embedding covert data in a text document, the method comprising: providing the document with a character that occurs in first and second occurrences; selecting the first occurrence of the character as a reference character and the second occurrence of the character as a rotatable character; altering a rotational orientation of the rotatable character to produce an altered character with a predetermined rotation with respect to the reference character, wherein the rotation represents the embedded covert data; and formatting the document to produce a formatted document based on the altered character.