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Chapter 4 General Oracle Security

SQL> select * from vw_claims_no_ssn;

---------- --------- ------ --------- ----------- ----- -
         1 XXXXXXXXX  12345  1234567   1200        1100 P
         2 XXXXXXXXX  12345  1234567   1800        1700 P
         2 XXXXXXXXX  12345  2345671   1400        1300 P

Note how the SSN field is masked by the Xs, effectively blocking them from being seen. If a user needs to see the member and other information, but the SSN cannot be disclosed, this view can be provided to them so that they can freely select anything but the protected health information.

Let's look at a little more complex requirement. A provider, i.e. a doctor or a hospital, will want to see the SSN number of his or her own patients for billing purposes, and it should be allowed. This can be achieved by somehow linking the provider's tables with their user names. Since we have a table called providers, the usernames can be stored in a column. This is how the provider table looks.

PROVIDER_ID                NUMBER
PROVIDER_NAME              VARCHAR2(200)                )

Let's look at the data stored inside the table providers.

The above text is an excerpt from:

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