8. A computer-implemented method for document authentication and identification, comprising: receiving a digitized document; comparing the digitized document to a set of markers to determine whether the digitized document is an encoded document with one or more text characters replaced, wherein the one or more text characters replaced includes at least one letter, number, symbol or space changed to another letter, number, or symbol; in response to determining that the digitized document is an encoded document with one or more characters replaced, extracting information from the set of markers using a decoder according to an encoding strategy; and comparing the extracted information and the set of markers with data stored in an encoding history to authenticate and identify the received digitized document.
8. A computer-implemented method for document authentication and identification, comprising: receiving a digitized document; comparing the digitized document to a set of markers to determine whether the digitized document is an encoded document with one or more text characters replaced, wherein the one or more text characters replaced includes at least one letter, number, symbol or space changed to another letter, number, or symbol; in response to determining that the digitized document is an encoded document with one or more characters replaced, extracting information from the set of markers using a decoder according to an encoding strategy; and comparing the extracted information and the set of markers with data stored in an encoding history to authenticate and identify the received digitized document. 10. The method of claim 8 wherein the decoder determines that the set of markers comprise at least one of: an inserted signature quote with information encoded in characters of the signature quote, and a modified sentence syntax with the information encoded in a modified location.