ENCRYPTION AND DECRYPTION METHOD FOR FILE USING EXTENDED ATTRIBUTE IN FILE SYSTEM AND ACCESS CONTROL SYSTEM FOR APPLICATIONS TO ENCRYPTED FILES SUPPORTING FOR REAL-TIME ENCRYPTION AND DECRYPTION FOR FILES

摘要

PURPOSE: it is a kind of coding file using extension file system characteristic, system for limit coding/access be supplied in real time easily match and managed coding about coding file and coding file. ;CONSTITUTION: file is stored in file system by using coding/decoding key. It includes the region that policy information is stored in extended attribute that the coding key information, which carries out coding, and wherein this document system provides. Access about coding file by policy information include encoded information be stored in extension feature area encode file (S25). ;The 2011 of copyright KIPO submissions