Standard file generation method using a steganography technology, and apparatus and method to validate the integrity of a metadata in its

摘要

information hiding technology, the present invention is produced by standard methods and their metadata in the file integrity checking device and its relates to a process, the integrity of the metadata that is inserted into the file, authentication and non-repudiation of the protected subject, and by providing features such as access control, file / external obtain a permanent relationship and service for the metadata obtains a consistency of, for implementing a variety of business models based on the terminal to allow, to provide a device and method for testing the integrity of the standard file generation method and its metadata using the information hiding techniques. ; To this end, the present invention is, in the standard file generation method, comprising: inserting a unique secret information that is assigned to group data (information) of the file, or to calculate the secret information from the file data (information) according to a predetermined formula ; Inserting metadata in the header (header) or a predetermined field (optional field) of the file; And by calculating the value of the integrity evidence metadata based on the specific code value (confidential information) and the meta-data, the calculated value inserted integrity evidence in the file, or separate administration in the database (DB) of the server includes a step, is used like a standard file format for metadata integrity test system.