1. A method for embedding covert data in a text document, the method comprising: providing the document with multiple characters that include a first character that occurs in first and second occurrences; analyzing a frequency of the multiple characters; selecting the first character from the multiple characters in response to the first character occurring most frequently in the multiple characters; selecting the first occurrence of the first character as a reference character and the second occurrence of the first 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.
1. A method for embedding covert data in a text document, the method comprising: providing the document with multiple characters that include a first character that occurs in first and second occurrences; analyzing a frequency of the multiple characters; selecting the first character from the multiple characters in response to the first character occurring most frequently in the multiple characters; selecting the first occurrence of the first character as a reference character and the second occurrence of the first 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. 2. A method as claimed in claim 1 , further comprising: selecting the first character and a second character from the multiple characters in response to the first character and the second character occurring most frequently in the multiple characters to produce selected characters; and for each of the selected characters, selecting a first occurrence of the selected character as a selected reference character and a second occurrence of the selected character as a selected rotatable character; altering a rotational orientation of the selected rotatable character to produce a selected altered character with the rotation with respect to the selected reference character, wherein the rotation represents the embedded covert data; and formatting the document to produce a formatted document based on the selected altered character.