Database System Concepts
7th Edition
ISBN: 9781260084504
Author: Abraham Silberschatz, S. Sudarshan, Abraham, Henry Korth, Silberschatz Abraham, Silberschatz Professor
Publisher: McGraw-Hill Education
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Chapter 9, Problem 9PE
Explanation of Solution
Reasons:
- In general, there is no possibility to index encrypted values, except all occurrences of the value encrypt to the same value.
- However, mapping of all occurrences of the value to the same encrypted value is typically risky as the statistical analysis can be utilized for revealing common values even without the decryption process.
- Many techniques based on inserting random salt bits can be utilized to prevent statistical analysis; however, they can make the indexing process impractical...
Explanation of Solution
Explanation:
- When tuples are inserted in the
database , the primary key constraint must be checked by the database.- If the primary key value is encrypted, the databas...
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