IACR News item: 29 May 2012
Yihua Zhang, Marina Blanton
ePrint Reportthe security community that allows a client to verify integrity and availability of the data that
she outsourced to an untrusted remove storage server at a relatively low cost. Most recent
solutions to this problem allow the client to read and update (i.e., insert, modify, or delete)
stored data blocks while trying to lower the overhead associated with verifying the integrity
of the stored data. In this work we develop a novel scheme, performance of which favorably
compares with the existing solutions. Our solution enjoys a number of new features such as a
natural support for operations on ranges of blocks, revision control, and support for multiple
user access to shared content. The performance guarantees that we achieve stem from a novel
data structure termed a balanced update tree and removing the need to verify update operations.
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