12. A system for document authentication and identification, comprising: an encoder configured to execute on a processing unit and perform a method comprising: receiving a digitized document; creating a set of markers associated with identification information; determining whether permission is given to modify semantic content of the digitized document; selecting an encoding strategy to apply the set of markers to the digitized document as identifying tags to produce an encoded document based on the determination whether permission is given to modify the semantic content of the digitized document, wherein the encoding strategy includes retaining the semantic content of the digitized document based on determining that permission to modify the semantic content of the digitized document is not given, and the encoding strategy includes modifying the semantic content of the digitized document based on determining that permission to modify the semantic content of the digitized document is given; applying the set of markers to the digitized document according to the encoding strategy to produce an encoded document with one or more characters replaced or rearranged; and storing a record of the set of markers and encoding strategy associated with the encoded document as encoding history; and a decoder configured to execute on the processing unit and perform a method comprising: receiving a returned digitized document; comparing the returned digitized document to the set of markers to determine whether the returned digitized document is the encoded document with one or more characters replaced or rearranged; in response to determining that the returned digitized document is the encoded with one or more characters replaced or rearranged, extracting information from the set of markers according to the encoding strategy; and comparing the extracted information and the set of markers with data stored in the encoding history to authenticate and identify the returned digitized document.
12. A system for document authentication and identification, comprising: an encoder configured to execute on a processing unit and perform a method comprising: receiving a digitized document; creating a set of markers associated with identification information; determining whether permission is given to modify semantic content of the digitized document; selecting an encoding strategy to apply the set of markers to the digitized document as identifying tags to produce an encoded document based on the determination whether permission is given to modify the semantic content of the digitized document, wherein the encoding strategy includes retaining the semantic content of the digitized document based on determining that permission to modify the semantic content of the digitized document is not given, and the encoding strategy includes modifying the semantic content of the digitized document based on determining that permission to modify the semantic content of the digitized document is given; applying the set of markers to the digitized document according to the encoding strategy to produce an encoded document with one or more characters replaced or rearranged; and storing a record of the set of markers and encoding strategy associated with the encoded document as encoding history; and a decoder configured to execute on the processing unit and perform a method comprising: receiving a returned digitized document; comparing the returned digitized document to the set of markers to determine whether the returned digitized document is the encoded document with one or more characters replaced or rearranged; in response to determining that the returned digitized document is the encoded with one or more characters replaced or rearranged, extracting information from the set of markers according to the encoding strategy; and comparing the extracted information and the set of markers with data stored in the encoding history to authenticate and identify the returned digitized document. 14. The system of claim 12 wherein the encoder is further configured to reorder one or more sentences as the one or more characters replaced; and further wherein the decoder is configured to determine that the set of markers are reordered sentences as the one or more characters replaced, and the information is encoded in replaced sentence locations according to the encoding strategy.