SYSTEM AND DEVICE FOR CIPHERING DATA, METHOD FOR CONTROLLING DATA CIPHERING SYSTEM, COMPUTER PROGRAM, AND COMPUTER-READABLE STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To allow ciphering devices and storages connected thereto to share correct time even in case of network trouble.;SOLUTION: Provided is a data ciphering system etc., which has a data ciphering means of ciphering data received from a data uploading means by using an open key that the data ciphering means has, of storing the ciphered data in a storage, and of deciphering the data at a request to download the data. The data ciphering system is characterized in that the data ciphering means has a time synchronizing function using a radio wave.;COPYRIGHT: (C)2005,JPO&NCIPI