z/OS UNIX System Services Planning
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Using security labels

z/OS UNIX System Services Planning
GA32-0884-00

Traditionally, access to z/OS UNIX resources is based on POSIX permissions. With the SECLABEL class active, authorization checks are performed for security labels in addition to POSIX permissions, to provide additional security. Security labels are used to maintain multiple levels of security within a system. By assigning a security label to a resource, the security administrator can prevent the movement of data from one level of security to another within the z/OS UNIX environment.

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