Negative Authorization

(redirected from Negative Authorizations)

Negative Authorization

A system that compares a credit card number to a list of lost or stolen numbers. When a credit card is used, the transaction will not be approved if the number matches a number on the list.
References in periodicals archive ?
Support for positive and negative authorizations: Positive authorizations state those accesses that are to be allowed; negative authorizations state accesses to be denied.
The model supports positive and negative authorizations that can be either strong or weak.
2) In particular, positive authorizations and negative authorizations can be specified at any level.
Section 9 surveys other authorization models supporting negative authorizations and group management.
Since negative authorizations cannot be specified for views, possible negative authorizations the user may have on the underlying tables are not redefined for the owner on the view.
Note that if the request is on a view table, function strong_auth() controls, beside the authorizations on the view, also the negative authorizations on the base tables underlying the view.
In addition to these temporal capabilities, the model supports both positive and negative authorizations.
Note that the possibility of expressing negative authorizations introduces potential conflicts.
is provided to denote positive and negative authorizations, authorizations regardless of their sign, Boolean expressions of authorizations, users, objects, access modes, sign of authorizations, and periodic expressions.
The second condition in the preceding definition implies that negative authorizations have higher priority than their positive counterparts at the same instant.
In Step 5, the algorithm considers the dependencies caused by negative authorizations (Step 5.
1995] for view maintenance, and extend them to the consideration of negative authorizations.