Classified documents/Information question?

I'm looking for a technical way to describe how access is given to people in a computer system of privileged information. For example, in the wikileaks case regarding the leaked cables there was a failure of ________ that allowed the PFC Manning to obtain access to classified documents. Unclear I know but... show more I'm looking for a technical way to describe how access is given to people in a computer system of privileged information.

For example, in the wikileaks case regarding the leaked cables there was a failure of ________ that allowed the PFC Manning to obtain access to classified documents.

Unclear I know but any attempt to guide me in the right direction is appreciated. Thanks
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