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In the age of cloud computing, cloud users with limited storage can outsource their data to remote servers. These servers, in lieu of monetary benefits, offer retrievability of their clients&#x2019; data at any point of time. Secure cloud storage protocols enable a client to check integrity of outsourced data. In this article, we explore the possibility of constructing a secure cloud storage for dynamic data by leveraging the algorithms involved in secure network coding. We show that some of the secure network coding schemes can be used to construct <italic>efficient</italic> secure cloud storage protocols for dynamic data, and we construct such a protocol (DSCS I) based on a secure network coding protocol. To the best of our knowledge, DSCS I is the first secure cloud storage protocol for <italic>dynamic</italic> data constructed using secure network coding techniques which is secure in the standard model. Although generic dynamic data support arbitrary insertions, deletions and modifications, <italic>append-only</italic> data find numerous applications in the real world. We construct another secure cloud storage protocol (DSCS II) specific to append-only data &#x2014; that overcomes some limitations of DSCS I. Finally, we provide prototype implementations for DSCS I and DSCS II in order to evaluate their performance.

Secure Cloud Storage With Data Dynamics Using Secure Network Coding Techniques