1. A computer-implemented method for encoding identification information in a document, comprising: receiving a digitized document; creating a set of markers associated with identification information; selecting an encoding strategy to apply the set of markers to the digitized document as identifying tags to produce an encoded document, wherein the encoded document retains semantic content of the digitized document absent permission to modify the semantic content of the digitized document; and applying the set of markers to the digitized document according to the encoding strategy using an encoder to produce an encoded document with one or more characters replaced.