Match the Following Terms with Their Meanings

Match the following terms with their meanings:
I. anomaly
II. composite key
III. encryption
IV. non-key field
A. the process of altering digital information using an algorithm to make it unreadable to anyone except those who possess the key
B. an error or inconsistency that occurs when you add, edit, and delete data
C. a field that is not part of the primary key
D. a primary key that is made up of two or more fields