Collaborate Disseminate
In all BLP model descriptions I’ve seen, the permissions set is defined to be {Read, Write, Append, Execute}.
None of the three BLP security properties
The Simple Security Property states that a subject at a given security level may not r… Continue reading Bell-Lapadula model "Execute" permission
my question is based on the post made Toaster which never got a reply (Bell-LaPadula Model Compartments). In BLP If a subject has a classification level General and compartment Land (General, {Land}), would he be able to read/write to (Gen… Continue reading Can a subject in Bell-LaPadula model write to other files with different compartments but same classification?
I’m trying to figure out Bell-LaPadula model and am having a hard time with compartments.
If Subject 1 is (SECRET, {C}) and they want to read Document 1 which is (UNCLASSIFIED, {A, B, C}), would they be able to? Read down is accepted in th… Continue reading Bell-LaPadula Model Compartments
What security model would be used for a company like paypal?
I have read about Bell La Padula, Biba and Brewer Nash I cannot really see which of these would be applicable to a system which deals with financial transactions.
Another thing I… Continue reading Security models used for paypal and financial services
I cannot find a single code example of Bell-LaPadula security model.
There are pleanty of questions but none got concluded.
Does anyone have a clear example in any language that demonstrate it?
Continue reading Bell-LaPadula looking for real code example [closed]
I have to find Read/Write permissions in this exercise.
Security Levels = Low < Medium < High
Categories = A, B
Subject: Alice
label(Alice) = (M, {A})
Objects:
label(o1) = (L, {A,B})
label(o1) = (L, {})
label(o1) = (M, {B})… Continue reading Bell-LaPadula permissions
In my lecture notes, it says that a system composed of two Bell-LaPadula-secure systems is not necessarily Bell-LaPadula-secure? Is there an example that demonstrates this concept?
In Bell LaPadula model, there are 2 properties:
* (star) properties: No write down
Simple properties: No read up
I can understand no write down and no read up, which is very descriptive.
However why are those propertie… Continue reading Why Bell-LaPadula simple and star properties are named that way?
We don’t have write-down in Bell-LaPadula (star property) however does this apply only to appending or does it also apply to overwriting data?
Continue reading How does replacing/overwriting data work in Bell-LaPadula?
I’ve been answering some questions about the Bell LaPadula model in my book, but I don’t seem to get the correct answer on b). Below I’ve tried to explain my thought process on how I’ve attemped to solve these problems.