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In case P i is evaluated on the other side than P Comp, a policy evaluation request is needed, which has a cost C PR ≃ C R. To take this into account, we define Ki,P as the minimum of the cost of evaluating P i when evaluating P Comp provider-side, thereby actually deciding on the optimal evaluation location of P i : K i, P = min ( C i, P, C i, T + C PR ) (CF5).
The reason why I could not know it was that I never submitted an evaluation request.
Thus, federated evaluation requires a policy evaluation request, while tenant-side evaluation does not require any attribute fetches.
Request 13 is the most extreme case, where all required attributes are stored tenant-side and 7 attribute requests are replaced by a single policy evaluation request.
The evaluation request was given to Computer Science and Computer Engineering students of the Computer Science Department of University of Cyprus and the Computer Engineering and Informatics of the University of Patras.
The same number is achieved if P9 (i.e., the part of the policy tree that is deployed provider-side) is not required to reach an access control decision, e.g., for requests 13 to 16. Smaller numbers are achieved in the other cases, e.g., requests 4 to 7. In these cases, multiple attribute fetches from tenant to provider are replaced by a single policy evaluation request.
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Thus, in order to give a realistic view of the performance impact of policy federation, we employ the policies from the case study and measure (i) the number of remote requests (i.e., attribute requests or policy evaluation requests) between tenant and provider needed for evaluating the policies and (ii) the total policy evaluation time.
Earlier this month, a judge ordered Mr. von Brunn to undergo the evaluation requested by his lawyer despite Mr. von Brunn's objections.
Companies can also upload their org charts to MicroEval, so that all the relevant folks get regular evaluation requests.
For each new search node, the composition module formulates evaluation requests.
Afterward, the algorithm tries to combine multiple remote policy references into a single reference again, in order to minimize the number of remote policy evaluation requests.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com