Which term is described by the description 'different keys for send and receive'?

Which term is described by the description 'different keys for send and receive'?

• A. Encryption
• B. Central processing unit
• C. Asymmetric encryption
• D. Symmetric encryption

Answer: (D)

The idea of using two different keys—one to encrypt and a separate one to decrypt—points to asymmetric encryption. In this setup, the sender uses the recipient’s public key to encrypt a message, and the recipient uses their private key to decrypt it. The keys are not shared; one is public and openly distributed, the other is kept secret. In contrast, symmetric encryption uses a single shared key for both encryption and decryption, so the two sides must securely share that same key. “Encryption” alone is too general, while the other option listed (a general processor) is unrelated. So the term described is asymmetric encryption.

The idea of using two different keys—one to encrypt and a separate one to decrypt—points to asymmetric encryption. In this setup, the sender uses the recipient’s public key to encrypt a message, and the recipient uses their private key to decrypt it. The keys are not shared; one is public and openly distributed, the other is kept secret. In contrast, symmetric encryption uses a single shared key for both encryption and decryption, so the two sides must securely share that same key. “Encryption” alone is too general, while the other option listed (a general processor) is unrelated. So the term described is asymmetric encryption.