METHOD OF MANAGING INNER INFORMATION AND SYSTEM FOR MANAGING INNER INFORMATION

摘要

A method and a system for managing internal information are provided to perform the update of an encryption key by assigning node keys by layers and nodes. A method for managing internal information includes the steps of: generating a GCK(Group Candidate Key) of each group layer node by a member of a user group corresponding to an upper node of the group layer node among the user groups corresponding to the nodes in a tree structure through a node key of the upper node and a GASK(Group Access Sub key) corresponding to the group level node(S110); and decoding the internal information encrypted by a user corresponding to the group level node through the GCK(S120).