DATA ENCRYPTION APPARATUS AND ITS METHOD

摘要

PURPOSE: A device of encoding data and method thereof are provided to enable an effective search about encoded database and reinforce privacy about a database by generating index information and enabling data based on the index information. CONSTITUTION: An encoding unit(102) encodes stored data. An index generator(104) partitions a total interval of the encoded data into subdivisions and rearranges the partitioned subdivisions. The index generating unit generates index information corresponding to a reordering order and transmits the index information and the rearranged encoded data to a storing device. The encoding unit transmits a search query including index information to a storage unit an receives searched and extracted data according to the index information from the storing device.