@article {35,
	title = {Adding long-term availability, obfuscation, and encryption to multi-cloud storage systems},
	journal = {Journal of Network and Computer Applications},
	volume = {59},
	year = {2016},
	month = {01/2016},
	pages = {208-218},
	abstract = {<p>Abstract Nowadays, storage services offer a new way for Cloud providers to do business. This new trend is proved by the number of Cloud storage providers that are continuously appearing on the market. By now, using Cloud storage services is becoming a common practice for end-users. However, the current Cloud storage providers do not offer any guarantees regarding long-term availability and privacy. In fact, data stored in the Cloud could be locked-in, lost, or violated in terms of privacy. In this work, we present an innovative system that on one hand allows end-users to simultaneously rely on different Cloud storage providers in a transparent way and on the other hand to enforce long-term availability, obfuscation, and encryption. Our system is highly reliable, in fact, if a provider is not temporarily or permanently available, end-users continue accessing their data in a secure way. In addition, only the end-users have the full control of the overall security of their data and no sensitive information are disclosed to Cloud storage providers. Several experiments allow us to discuss the performance of our system compared against existing solutions.</p>
},
	keywords = {cloud computing, Long-term availability, Privacy, Reliability, Storage Clouds},
	issn = {1084-8045},
	doi = {10.1016/j.jnca.2014.09.021},
	url = {http://www.sciencedirect.com/science/article/pii/S1084804514002288},
	author = {A. Celesti and M. Fazio and M. Villari and A. Puliafito}
}
@booklet {47,
	title = {Data Reliability In Multi-provider Cloud Storage Service With RRNS},
	journal = {Advances in Service-Oriented and Cloud Computing},
	volume = {393},
	year = {2013},
	month = {13},
	pages = {83{\textendash}93},
	publisher = {Springer - Verlag Berlin Heidelberg},
	address = {Berlin},
	abstract = {Nowadays, more and more Cloud storage providers are appearing on the market. Nevertheless, data availability and confidentiality represent critical issues considering Cloud computing. This paper discusses an approach that on one hand enables customers to use at the same time different Cloud storage providers, and that on the other hand guarantees both data redundancy and obfuscation. According to our approach, files are fragmented and stored in different Cloud storage providers by means of the Redundant Residue Number System (RRNS). Besides providing us data redundancy, RRNS allows us to preserve the data confidentiality by means of an obfuscation-base strategy spreading metadata over different cloud providers. In addition, our approach allows a customer to retrieve his/her files even if a cloud storage provider is not available anymore. Experiments highlight the factors that have to be considered to configure the system according to the customer{\textquoteright}s requirements.},
	keywords = {Big Data, cloud computing, Confidentiality, Reliability, Storage},
	url = {http://link.springer.com/chapter/10.1007/978-3-642-45364-9_8},
	author = {M. Villari and A. Celesti and F. Tusa and A. Puliafito}
}
