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Chapter 4 General Oracle Security

---------- --------- ------------ -
         1 123456789         1200 P
         2 234567891         1800 P

Note, only the claims with the PROVIDER_ID = 1234567 come back, not the one with 2345671. Why? Because that is how the view is defined – to automatically filter the rows the user is not authorized to see.

In a later chapter, we will explore another concept called Virtual Private Database, or Fine Grained Access Control, that provides even more functionality without the use of views or complex definitions.

Combining the column masking and the view filtering, we can provide the important functionality HIPAA requires. The law says that users should not accidentally see the data they are not supposed to see.

For instance, a senior claim analyst like JUDY should be able to see all claims, but junior analysts like NATHAN should see only the claims below $2000, according to the policies of the company. Nathan can be granted select privileges on a view that filters the claim amounts automatically. Similarly, creating a view to mask the sensitive data also satisfies the requirement.

Action Plan: Identify the different visibility requirements for various users and construct views for each group. Revoke privileges from the base tables and grant on these views.

Program-Based Security

The above text is an excerpt from:

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