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Oracle PL/SQL for DBAs
book

Oracle PL/SQL for DBAs

by Arup Nanda, Steven Feuerstein
October 2005
Intermediate to advanced content levelIntermediate to advanced
454 pages
14h 44m
English
O'Reilly Media, Inc.
Content preview from Oracle PL/SQL for DBAs

Using a Key for Each Row

With the second approach, a different key is used for each row of a table, as shown in Figure 4-4. This approach is far more secure than the one discussed in the previous

Single database-key approach
Figure 4-3. Single database-key approach

section. Even if a thief succeeds in stealing a key, only one row will be compromised, not the entire table or the database. There are some disadvantages of this approach: the proliferation of keys makes it extremely difficult to manage them. Also, because encryption and decryption operations need to generate or retrieve a different key for each row, performance will suffer. Nevertheless, the added security provided by this approach makes it preferable in most encryption systems.

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Publisher Resources

ISBN: 0596005873Supplemental ContentErrata Page