Kuroda Tomohiro, Kimura Eizen, Matsumura Yasushi, Yamashita Yoshinori, Hiramatsu Haruhiko, Kume Naoto
Division of Medical Information Technology and Administration Planning, Kyoto University Hospital, Japan.
Stud Health Technol Inform. 2013;192:171-4.
In the face of a disaster hospitals are expected to be able to continue providing efficient and high-quality care to patients. It is therefore crucial for hospitals to develop business continuity plans (BCPs) that identify their vulnerabilities, and prepare procedures to overcome them. A key aspect of most hospitals' BCPs is creating the backup of the hospital information system (HIS) data at multiple remote sites. However, the need to keep the data confidential dramatically increases the costs of making such backups. Secret sharing is a method to split an original secret message so that individual pieces are meaningless, but putting sufficient number of pieces together reveals the original message. It allows creation of pseudo-redundant arrays of independent disks for privacy-sensitive data over the Internet. We developed a secret sharing environment for StarBED, a large-scale network experiment environment, and evaluated its potential and performance during disaster recovery. Simulation results showed that the entire main HIS database of Kyoto University Hospital could be retrieved within three days even if one of the distributed storage systems crashed during a disaster.
面对灾难时，医院应能够继续为患者提供高效且高质量的护理。因此，医院制定业务连续性计划（BCP）至关重要，该计划要识别自身的脆弱性，并准备克服这些脆弱性的程序。大多数医院BCP的一个关键方面是在多个远程站点创建医院信息系统（HIS）数据的备份。然而，对数据保密的需求大幅增加了进行此类备份的成本。秘密共享是一种分割原始秘密消息的方法，这样单个片段毫无意义，但将足够数量的片段组合在一起就能揭示原始消息。它允许通过互联网为对隐私敏感的数据创建独立磁盘的伪冗余阵列。我们为大规模网络实验环境StarBED开发了一个秘密共享环境，并评估了其在灾难恢复期间的潜力和性能。模拟结果表明，即使在灾难期间分布式存储系统之一发生故障，京都大学医院的整个主要HIS数据库也能在三天内恢复。
