The process of coding information to make it unreadable except to those who have a special piece of information known as a key.

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The process described is encryption, which involves converting plaintext or readable information into a coded, unreadable format using a cryptographic algorithm and a key that is needed to decrypt or decode the information back into its original form. The other options (restriction, security, and protection) do not accurately describe this process.

The Process of Coding Information to Make It Unreadable Except