Abstract
To secure business continuity is indispensable for hospitals to fulfill its social responsibility under disasters. Although to back up the data of the hospital information system at multiple remote sites is a key strategy of business continuity plan, the requirements to treat privacy sensitive data jack up the cost for the backup. The secret sharing is a method to split an original secret message up so that each individual piece is meaningless, but putting sufficient number of pieces together to reveal the original message. The secret sharing method allows us to create pseudo redundant arrays of independent disks for such privacy-sensitive data with non-precious storage services over the Internet. This paper evaluated the feasibility of secret sharing through simulation on a large-scale network experiment environment and on a commercial secret sharing service platform on the Internet. The simulation result confirms the feasibility of the existing secret sharing services for HIS data backup, although additional performance tuning of encryption and disk IO processe is required.
