Fill in the blank with the appropriate word.
_____________________is a method to increase the security of a message or file by scrambling the contents so that the file or message can be read only by someone who has the right encryption key to unscramble it.

Answer: Encryption

Explanation:
Encryption is a method to increase the security of a message or file by scrambling the contents so that the file or message can be read only by someone who has the right encryption key to unscramble it. A user can use encryption when he wants a strong level of protection for his information.