INSERTING METHOD OF DOCUMENT IDENTIFIER AND DECODING METHOD THEREOF

摘要

PURPOSE: An insertion method of a character identifier and a decoding method for easily inserting a document identifier are provided to prevent the leakage of the document by concealing the existence of the document identifier by inserting the document identifier. CONSTITUTION: A document identifier is calculated and the document style sort information obtains(S101-S104). Character string information is extracted from text data(S105). Characters located in the schedule order are successively extracted from the extracted character string information as described above based on the text unit(S106). The information showing the document style sort information is inserted to successively extracted characters(S110). Characters located in the schedule order are successively extracted in one or more page 'it is related to the order of sentence.