Access Control in Data Management Systems by Elena Ferrari PDF

By Elena Ferrari

ISBN-10: 1608453758

ISBN-13: 9781608453757

Entry regulate is without doubt one of the basic providers that any facts administration method should still offer. Its major objective is to guard facts from unauthorized learn and write operations. this is often quite an important in modern day open and interconnected global, the place each one type of info will be simply made to be had to a major person inhabitants, and the place a harm or misuse of information could have unpredictable outcomes that transcend the limits the place facts dwell or were generated. This publication presents an summary of a few of the advancements in entry keep watch over for facts administration platforms. Discretionary, necessary, and role-based entry keep watch over might be mentioned, through surveying the main correct proposals and interpreting the advantages and disadvantages of every paradigm in view of the necessities of alternative software domain names. entry regulate mechanisms supplied by way of advertisement facts administration platforms are awarded and mentioned. ultimately, the final a part of the publication is dedicated to dialogue of a few of the main not easy and cutting edge study traits within the region of entry keep an eye on, similar to these with regards to the internet 2.0 revolution or to the Database as a carrier paradigm. This booklet is a useful reference for an heterogeneous viewers. it may be used as both a longer survey for those who have an interest in entry regulate or as a reference e-book for senior undergraduate or graduate classes in facts safeguard with a different specialize in entry keep an eye on. it's also important for technologists, researchers, managers, and builders who need to know extra approximately entry keep an eye on and similar rising traits.

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Then, the modified query is executed and the results returned to the user. VPD functions may exploit application contexts. An application context stores a set of properties of users/sessions that may be used by VPD policies to enforce context-based access control constraints. Application contexts may be system or user defined. ). Attributes of the USERENV context cannot be modified. If one wants to specify a policy exploiting additional attributes with respect to those contained into USERENV, he/she can create his/her own contexts, through the CREATE CONTEXT command.

If a VPD column-level policy is specified for a column C of a relation R, then, when C is referenced in a query, the system returns by default only the rows of R that satisfy the policy. Columns that trigger the evaluation of the policy can be specified by using the sec_relevant_cols parameter of the ADD_POLICY procedure. 4 and suppose that the following policy should be enforced over it: each user can see all the information in the Rentals relation, apart from information 5 We refer the interested readers to Oracle Corporation [2009] for the whole list of parameters that can be used in the ADD_POLICY procedure.

Such modeling concepts need to be taken into account when developing an access control model. For instance, the semantic relationships existing in the object model can be exploited to establish relationships between the authorizations given on semantically related objects. The other key difference between the object model and the relational one is that an object, besides being a data container, can have methods associated with it. Therefore, method invocation and their accesses to the managed data should be properly regulated.

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Access Control in Data Management Systems by Elena Ferrari


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