Open AccessPosted Content
PORs: Proofs of Retrievability for Large Files
Ari Juels,Burton S. Kaliski +1 more
TLDR
This paper defines and explores proofs of retrievability (PORs), a POR scheme that enables an archive or back-up service to produce a concise proof that a user can retrieve a target file F, that is, that the archive retains and reliably transmits file data sufficient for the user to recover F in its entirety.Abstract:
In this paper, we define and explore proofs of retrievability (PORs). A POR scheme enables an archive or back-up service (prover) to produce a concise proof that a user (verifier) can retrieve a target file F, that is, that the archive retains and reliably transmits file data sufficient for the user to recover F in its entirety.A POR may be viewed as a kind of cryptographic proof of knowledge (POK), but one specially designed to handle a large file (or bitstring) F. We explore POR protocols here in which the communication costs, number of memory accesses for the prover, and storage requirements of the user (verifier) are small parameters essentially independent of the length of F. In addition to proposing new, practical POR constructions, we explore implementation considerations and optimizations that bear on previously explored, related schemes.In a POR, unlike a POK, neither the prover nor the verifier need actually have knowledge of F. PORs give rise to a new and unusual security definition whose formulation is another contribution of our work.We view PORs as an important tool for semi-trusted online archives. Existing cryptographic techniques help users ensure the privacy and integrity of files they retrieve. It is also natural, however, for users to want to verify that archives do not delete or modify files prior to retrieval. The goal of a POR is to accomplish these checks without users having to download the files themselves. A POR can also provide quality-of-service guarantees, i.e., show that a file is retrievable within a certain time bound.read more
Citations
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Journal ArticleDOI
Review: A survey on security issues in service delivery models of cloud computing
S. Subashini,V. Kavitha +1 more
TL;DR: A survey of the different security risks that pose a threat to the cloud is presented and a new model targeting at improving features of an existing model must not risk or threaten other important features of the current model.
Posted Content
Provable Data Possession at Untrusted Stores.
Giuseppe Ateniese,Randal Burns,Reza Curtmola,Joseph Herring,Lea Kissner,Zachary N. J. Peterson,Dawn Song +6 more
TL;DR: Ateniese et al. as discussed by the authors introduced the provable data possession (PDP) model, which allows a client that has stored data at an untrusted server to verify that the server possesses the original data without retrieving it.
Book ChapterDOI
The knowledge complexity of interactive proof-systems
TL;DR: Permission to copy without fee all or part of this material is granted provided that the copies arc not made or distributed for direct commercial advantage.
Journal ArticleDOI
Enabling Public Auditability and Data Dynamics for Storage Security in Cloud Computing
TL;DR: To achieve efficient data dynamics, the existing proof of storage models are improved by manipulating the classic Merkle Hash Tree construction for block tag authentication, and an elegant verification scheme is constructed for the seamless integration of these two salient features in the protocol design.
Proceedings ArticleDOI
Privacy-Preserving Public Auditing for Data Storage Security in Cloud Computing
TL;DR: This paper utilize and uniquely combine the public key based homomorphic authenticator with random masking to achieve the privacy-preserving public cloud data auditing system, which meets all above requirements.
References
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Proceedings ArticleDOI
Robust Dynamic Provable Data Possession
Bo Chen,Reza Curtmola +1 more
TL;DR: This work proposes the first RDC schemes that provide robustness and, at the same time, support dynamic updates, while requiring small, constant, client storage, and overcomes the drawback of a high communication cost for updates.
Proceedings ArticleDOI
Data security in cloud computing
TL;DR: This article discusses cloud computing data security issues, including tile security of data transmission, storage, security and management of security, and enumerates the corresponding strategies and long-term development direction.
Proceedings ArticleDOI
IoT Data Integrity Verification for Cyber-Physical Systems Using Blockchain
TL;DR: This work proposes an architecture that can take advantage of blockchain features to allow further integrity verification of data produced by IoT devices even in the realm of CPS, and a performance evaluation of the critical path of data to demonstrate that the architecture respect time-bounded operations demanded by the sense-decide-actuate cycle of CPSs.
Proceedings ArticleDOI
Efficient dynamic provable possession of remote data via balanced update trees
Yihua Zhang,Marina Blanton +1 more
TL;DR: This work develops a novel and efficient scheme, computation and communication overhead of which is orders of magnitude lower than those of other state-of-the-art schemes, and removing the need to verify update operations.
Proceedings ArticleDOI
Towards verifiable resource accounting for outsourced computation
TL;DR: It is shown that ALIBI efficiently and verifiably tracks guests' memory use and CPU-cycle consumption and is a first step toward a vision for verifiable resource accounting.