Study of a Secure Backup Network Mechanism for Disaster Recovery and Practical Network Applications

A practical mechanism for a file-backup system concept is proposed. In this paper, it is demonstrated that a highly secure file backup mechanism can be achieved by combining technologies that implement the following: spatial random scrambling of file data, subsequent random fragmentation of the file, the duplication and encryption of each file fragment using a stream cipher code in each encryption stage, and the corresponding notification of the history data of the encryption key code sequence used in "encryption metadata". If a disaster should occur in the data backup center, prompt data recovery can be easily and securely achieved by making use of a massive number of widely distributed wired PCs, mobile PCs, cellular phones managed by multiple supervisory servers which are secretly diversified but functionally combined. In an experimental evaluation, encryption performance, spatial scrambling performance and the average response time from the Web server have been estimated in terms of the memory load characteristics of the data center. Discussion is also provided on an effective shuffling algorithm to determine the dispersed location sites. Finally this paper describes a system configuration for a practical application, which will be soon commercialized. Keywords-disaster recovery; backup; metadata; distributed processing; shuffle algorithm