Data outsourced to an external storage server are usually encrypted since there is the common assumption that all data are equally sensitive. The encrypted data however cannot be efficiently queried and their selective release is not possible or require the application of specific solutions. To overcome these problems, new proposals have been recently developed, which are based on a fragmentation technique possibly combined with encryption. The main advantage of these proposals is that they limit the use of encryption, thus improving query execution efficiency. In this paper, we describe such fragmentation-based approaches focusing in particular on the different data fragmentation models proposed in the literature. We then conclude the paper with a discussion on some research directions.
Privacy of outsourced data / S. De Capitani di Vimercati, S. Foresti - In: Privacy and identity management for life / [a cura di] M. Bezzi, P. Duquenoy, S. FischerHubner, M. Hansen, G. Zhang. - Berlin : Springer, 2010. - ISBN 9783642142819. - pp. 174-187 (( Intervento presentato al 5. convegno IFIP WG ; PrimeLife International Summer School tenutosi a Nice nel 2009.
Privacy of outsourced data
S. De Capitani di VimercatiPrimo
;S. ForestiUltimo
2010
Abstract
Data outsourced to an external storage server are usually encrypted since there is the common assumption that all data are equally sensitive. The encrypted data however cannot be efficiently queried and their selective release is not possible or require the application of specific solutions. To overcome these problems, new proposals have been recently developed, which are based on a fragmentation technique possibly combined with encryption. The main advantage of these proposals is that they limit the use of encryption, thus improving query execution efficiency. In this paper, we describe such fragmentation-based approaches focusing in particular on the different data fragmentation models proposed in the literature. We then conclude the paper with a discussion on some research directions.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.