Abstract
Cloud computing, a recent computing technology which entirely changed the IT industry since it started to deliver resources as services through a single click. Even though cloud offers different services among storage as a service is widely used one, where users are free to store any information irrespective of its content. But, security and privacy becomes the issues here. Multi-owner data storing and sharing in a dynamic environment dumps huge amount of data files in the cloud, which remains in cloud for indefinite period of time. Since it remains there for a long period of time, the sensitive information stored may misused by any miscreant or even by service providers. To maintain cloud file’s security and privacy regular removal of unwanted files is needed. A self-destructing system can be used to remove unwanted files automatically when the predefined time period for sharing specified by data owner has been expired. Such a system destructs the decryption keys immediately after time expiration followed by deletion of all replicas of the data file. By using RSA algorithm and Shamir’s secret sharing scheme such a system can be developed.
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