Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A fine-grained policy model for Provenance-based Access Control and
  Policy Algebras.pdf   A fine-grained provenance-based access control policy model is proposed in
this paper, in order to improve the express performance of existing model. This
method employs provenance as conditions to determine whether a piece of data
can be accessed because historical operations performed on data could reveal
clues about its sensitivity and vulnerability. Particularly, our proposed work
provides a four-valued decision set which allows showing status to match a
restriction particularly. This framework consists of target policy, access
control policy, and policy algebras. With the complete definition and algebra
system construction, a practical fine-grained access control policy model is
developed.

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The categories of this paper are: physics
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The categories of this paper are: eess
26
The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol