e-Business and Telecommunications: 6th International Joint by Blagovest Shishkov (auth.), Mohammad S. Obaidat, Joaquim

By Blagovest Shishkov (auth.), Mohammad S. Obaidat, Joaquim Filipe (eds.)

This publication constitutes the refereed complaints of the sixth overseas Joint convention on e-Business and Telecommunications, ICETE 2009, held in Milan, Italy, in July 2009. The 34 revised complete papers awarded including four invited papers during this quantity have been conscientiously reviewed and chosen from three hundred submissions. they've got handed rounds of choice and development. The papers are equipped in topical sections on e-business; protection and cryptography; sign processing and multimedia functions; instant info networks and systems.

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There are however situations where the owners do not wish to publicly declare to whom they give (or not give) access to their resources. In these cases, the authorization policy should be kept confidential. In [37] the authors have presented a first proposal that addresses this issue. Alternative solutions however may be envisioned. – Write Accesses. Current proposals in the data outsourcing scenario are based on the assumption that write operations can be executed only by the data owner. Although this assumption is realistic in the data outsourcing scenario, there may exist other contexts where the consideration of read privileges only is limiting.

Samarati Race DoB Sex Illness white white white white asian asian asian asian asian * * * * * * * * * F F M M M M M F F stomach ulcer gastritis stomach ulcer arrhythmia aids aids flu flu hypertension Fig. 5. , a value that is rare in the population is frequent in the q-block). If an attacker knows that a respondent is represented in the released table and that she belongs to a specific q-block, she can reduce her uncertainty about the value of the sensitive attribute for the target respondent. As an example, consider the 2-diverse table in Figure 5 and suppose that Alice knows that John is an asian male born in 1964 and that he is represented in the table.

Organizations have then to add data storage (and skilled administrative personnel) at a high rate to mange such an amount of information. An alternative solution to the problem, which is becoming increasingly popular as it saves costs and provides service benefits, it is represented by data outsourcing. Data are stored together with application front-ends at external servers who take full responsibility of their management. , the server may be honest-but-curious). Since traditional access control techniques cannot prevent the server itself from making unauthorized accesses to the outsourced data, data are encrypted.

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