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72 results on '"Paraboschi, S."'

3. Metadata Management in Outsourced Encrypted Databases

Author

Damiani, E., De Capitani di Vimercati, S., Foresti, S., Jajodia, S., Paraboschi, S., Samarati, P., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jonker, Willem, editor, and Petković, Milan, editor

Published
2005
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11. Towards adaptive access control

Author

Argento, Luciano, Margheri, Andrea, Paci, Federica, Sassone, Vladimiro, Zannone, Nicola, Paraboschi, S., Kerschbaum, F., and Security

Subjects
Exploit, Computer science, First line, Access control, 02 engineering and technology, Computer security, computer.software_genre, Insider, access control, machine learning, insider threats, machine learning, Machine learning, 0202 electrical engineering, electronic engineering, information engineering, business.industry, insider threats, 05 social sciences, Policy adaptation, 050301 education, Information technology, Insider threat, Behavioral pattern, 020207 software engineering, Order (business), Runtime monitoring, business, 0503 education, computer
Abstract

Access control systems are nowadays the first line of defence of modernIT systems. However, their effectiveness is often compromised by policymiscofigurations that can be exploited by insider threats. In this paper, we presentan approach based on machine learning to refine attribute-based access controlpolicies in order to reduce the risks of users abusing their privileges. Our approachexploits behavioral patterns representing how users typically access resourcesto narrow the permissions granted to users when anomalous behaviors are detected. The proposed solution has been implemented and its effectiveness has been experimentally evaluated using a synthetic dataset.

Published
2018

12. Basi di dati: Architetture e Linee di Evoluzione

Author

ATZENI, Paolo, Ceri S, Fraternali P, Paraboschi S, Torlone R., Atzeni, Paolo, Ceri, S., Fraternali, P., Paraboschi, S., Torlone, Riccardo, Ceri, S, Fraternali, P, Paraboschi, S, and Torlone, R.

Published
2003

19. Preserving confidentiality of security policies in data outsourcing scenarios

Author

De Capitani di Vimercati, S., Foresti, S., Jajodia, S., Paraboschi, S., Pelosi, Gerardo, and Samarati, P.

Subjects
Data outsourcing, Encryption layer, Encryption policy, Privacy, Security policy, Security policy protection, Transitive closure, Privacy, Security policy, Security policy protection, Transitive closure, Encryption layer, Encryption policy, Data outsourcing
Published
2008

22. A protocol for reputation management in super-peer networks

Author

Chhabra, S., ernesto damiani, Capitani Di Vimercati, S., Paraboschi, S., and Samarati, P.

Subjects
P2P, Super-Peer architectures, Security, Web technology, Reputation management, Settore ING-INF/05 - Sistemi di Elaborazione delle Informazioni
Published
2004

24. Flexible and scalable digital library search

Author

Blok, H.E., Apers, Peter M.G., Windhouwer, Menzo, Atzeni, P., van Zwol, Roelof, Ceri, S., Paraboschi, S., Petkovic, M., Ramamohanarao, K., Snodgrass, R.T., Kersten, Martin, Jonker, Willem, and Databases (Former)

Subjects
IR-63490, DB-MMR: MULTIMEDIA RETRIEVAL, EWI-7169
Published
2001

38. Access Control Models for XML.

Author

Gertz, Michael, Jajodia, Sushil, Vimercati, S. De Capitani di, Foresti, S., Paraboschi, S., and Samarati, P.

Abstract

XML has become a crucial tool for data storage and exchange. In this chapter, after a brief introduction on the basic structure of XML, we illustrate the most important characteristics of access control models. We then discuss two models for XML documents, pointing out their main characteristics. We finally present other proposals, describing their main features and their innovation compared to the previous two models. [ABSTRACT FROM AUTHOR]

Published
2008
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40. An Experimental Evaluation of Multi-Key Strategies for Data Outsourcing.

Author

Venter, Hein, Eloff, Mariki, Labuschagne, Les, Eloff, Jan, von Solms, Rossouw, Damiani, E., De Vimercati, S., Foresti, S., Jajodia, S., Paraboschi, S., and Samarati, P.

Abstract

Data outsourcing is emerging today as a successful solution for organizations looking for a cost-effective way to make their data available for on-line querying. To protect outsourced data from unauthorized accesses, even from the (honest but curious) host server, data are encrypted and indexes associated with them enable the server to execute queries without the need of accessing cleartext. Current solutions consider the whole database as encrypted with a single key known only to the data owner, which therefore has to be kept involved in the query execution process. In this paper, we propose different multi-key data encryption strategies for enforcing access privileges. Our strategies exploit different keys, which are distributed to the users, corresponding to the different authorizations. We then present some experiments evaluating the quality of the proposed strategies with respect to the amount of cryptographic information to be produced and maintained. [ABSTRACT FROM AUTHOR]

Published
2007
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41. Metadata Management in Outsourced Encrypted Databases.

Author

Jonker, Willem, Petković, Milan, Damiani, E., Capitani di Vimercati, S., Foresti, S., Jajodia, S., Paraboschi, S., and Samarati, P.

Abstract

Database outsourcing is becoming increasingly popular introducing a new paradigm, called database-as-a-service, where a client's database is stored at an external service provider. Outsourcing databases to external providers promises higher availability and more effective disaster protection than in-house operations. This scenario presents new research challenges on which the usability of the system is based. In particular, one important aspect is the metadata that must be provided to support the proper working of the system. In this paper, we illustrate the metadata that are needed, at the client and server, to store and retrieve mapping information for processing a query issued by a client application to the server storing the outsourced database. We also present an approach to develop an efficient access control technique and the corresponding metadata needed for its enforcement. [ABSTRACT FROM AUTHOR]

Published
2005
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46. The IDEA tool set

Author

Ceri, S., primary, Fraternali, P., additional, Paraboschi, S., additional, Baralis, E., additional, and Fravega, A., additional

Published
1997
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48. The LOGRES prototype

Author

Cacace, F., primary, Ceri, S., additional, Crespi-Reghizzi, S., additional, Fraternali, P., additional, Paraboschi, S., additional, and Tanca, L., additional

Published
1993
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49. LOGRES prototype

Author

Filippo Cacace, Ceri, S., Crespi-Reghizzi, S., Fraternali, P., Paraboschi, S., and Tanca, L.

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