云存储服务中可证明数据持有及恢复技术研究

云存储可以实现任意地点、任意时间、任意数据访问及保障法规遵从的需求等.对存储需求不可预测、需要廉价存储的用户来说,按需购买存储容量的云存储与一次性购买整套存储系统相比显然会带来更多的方便和效益,且云存储在为用户节省投资的同时也节约了社会资源与能源.但是,因为云存储的安全性、可靠性及服务水平等还存在众多问题亟待解决,所以云存储还未得到人们的广泛认可与使用.当用户将数据存放在云存储中,他们最关心的是数据是否完整无误;如果出现故障,是否可以恢复其数据.所以,在云存储中只有让用户可以验证存储服务提供者正确地持有其数据,且当检测到错误时可实现数据恢复,他们才可放心地使用云存储.综述了可证明数据持有及恢复技术在国内外的研究现状,讨论了云存储服务的安全性与可靠性需求,并研究云存储服务对可证明数据持有及恢复方案的特殊要求,从而明确在云存储环境下可证明数据持有及恢复技术的研究方向.

Research on Provable Data Possession and Recovery Technology in Cloud Storage

Cloud storage achieves the goals that users can access their data anywhere and at any time. It can also comply with a growing number of legislations. For users whose storage requirements are unpredictable and users who need low-cost storage, the cloud storage is a good choice for its convenience and efficiency. Moreover, cloud storage saves investment at the same time it also saves social resources and energy. However, because of security, reliability and service levels, cloud storage has not yet been widely recognized and utilized. When users store their data in the cloud storage, they most concern about whether the data is complete and correct; if there is a failure, whether it can be recovered. So, let users verify that the storage server keeps on holding their data completely and correctly is significant. This paper reviews the state of the art research works on provable data possession and recovery technology. Then the application of these technologies in cloud storage considering its special requirements is discussed. It points out the directions of provable data possession and recovery technology in cloud storage.