Questions tagged [access-control]

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6
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2answers
804 views

Why is there readonly (const) in C++, but not writeonly (sink)?

C++ initially had "readonly" and "writeonly" qualifiers, before "readonly" was renamed to "const", and "writeonly" removed. My question is: What are the problems with "writeonly" (or a "sink" ...
6
votes
2answers
206 views

Fine-grained security models for XML data

Access control models are typically very coarse-grained, allowing one access to a resource (possibly with some combination of read/write/execute permission) or exclude such access. Some models of ...
3
votes
2answers
2k views

Can the Bell-LaPadula model emulate the Chinese Wall model?

I have been reading on security policies and the question wether Bell-LaPadula can be used to implement Chinese Wall. Does anyone know more about it?
3
votes
2answers
9k views

Direct vs. Random Access

Would someone please clarify for me the difference between direct and random access? Specifically, why does this Wikipedia article on Direct Access Storage Devices distinguish between the two: ...
2
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1answer
24 views

Formally modelling and describing access rights

Is there a formal theory or framework described in text books that models access rights in a mathematical way. I would expect things similar to the following: We have data (objects). We have ...
2
votes
1answer
334 views

Access control matrices: who are the subjects: users or processes?

I'm studying the basics of security in computers. The doubt I have is that the access control matrix is presented as a matrix whose rows are the subjects and the columns are the objects. Also subjects ...
1
vote
3answers
112 views

Is it possible to define branches which, once taken once, will become the default forever?

Assuming I have a very simple branching: switch on var: 1 => branch1 2 => branch2 default => branch3 And I wish to implement a program that will ...
1
vote
1answer
127 views

Where can I find good study material on Role Mining?

I need to cover these topics in Role Mining. If anyone knows good site which well summarizes the topics and concepts are well explained please help out. Basic role mining problem • Delta-approx RMP • ...
1
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0answers
99 views

What is an access control graph?

A question I came across describes a scenario of an information system in a clerical office and states- "Identify the sets of S={subjects}, O={objects} and P={privileges} for the above systems of the ...