Which technique prevents unauthorized users from reading data by mathematically changing it into an unreadable form that requires a key for restoration?
A way of marking content by level of importance
A reversible procedure that applies keys to scramble content
A one-way function that generates a unique, fixed-size result
A data sanitization approach that removes information
The method that uses a reversible, key-based process is the correct one because it enables transforming data into an unreadable state and restoring it later. Permanently removing information cannot be reversed, categorizing data does not prevent unauthorized viewing, and a one-way function does not allow the original content to be retrieved.
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