Which term reverts the information to its original state?

Which term reverts the information to its original state?

• A. Recovery
• B. Encryption
• C. Authentication
• D. Decryption Key

Answer: (D)

Reversing encrypted data back to its original form is decryption. The decryption key is what enables that reversal, letting you recover the plaintext from the ciphertext. In symmetric systems, the same key decrypts the data; in public-key setups, a private decryption key performs the reverse operation. The other terms describe different ideas: recovery is about restoring data after loss, encryption is the process of turning plaintext into ciphertext, and authentication is about verifying identity. Since the focus is on what enables returning the data to its original state, the decryption key is the best fit.

Reversing encrypted data back to its original form is decryption. The decryption key is what enables that reversal, letting you recover the plaintext from the ciphertext. In symmetric systems, the same key decrypts the data; in public-key setups, a private decryption key performs the reverse operation. The other terms describe different ideas: recovery is about restoring data after loss, encryption is the process of turning plaintext into ciphertext, and authentication is about verifying identity. Since the focus is on what enables returning the data to its original state, the decryption key is the best fit.