| 摘要 |
PURPOSE: A method for classifying information by using an extra field in a zip file is provided to selectively block a file by confirming only a sign indication on an extra field of the zip file. CONSTITUTION: A user terminal or a server compresses an original file into a zip file, encodes an information classification value, and inserts the value into the zip file in order to prepare the zip file(a). The user terminal or the server confirms and decodes the information classification value to classify the zip file into a normal one or an abnormal one(b). The zip file is transmitted by using a webmail, a messenger, and a P2P(Peer-to-Peer). [Reference numerals] (a) User terminal or server compresses an original file into a zip file, encodes an information classification value, and inserts the value into the zip file in order to prepare the zip file; (b) User terminal or server confirms and decodes the encoded information classification value of the prepared zip file to or not to classify the zip file into a normal one |
