What is Encryption?

• A. Process of converting information into an unintelligible form except to holders of a specific cryptographic key. Use of encryption protects information between the encryption process and the decryption process against unauthorized disclosure.
• B. Process of storing data on magnetic disks
• C. A technique for blocking network access
• D. A method of updating software automatically

Answer: (A)

Encryption is the process of converting information into an unreadable form so that only someone with the correct cryptographic key can recover the original data. This protects confidentiality by ensuring that even if data is intercepted or accessed without authorization, it remains unintelligible. The phrase “between the encryption process and the decryption process” highlights that the data is transformed into ciphertext during encryption and only deciphered back to plaintext during decryption, by those who hold the key.

The other options don’t describe encryption. Storing data on magnetic disks is about storage media, not protecting the data’s confidentiality. Blocking network access relates to preventing connections (a network security control), not converting data into an unreadable form. Automatically updating software is about patch management, not data encryption.