Question

Encrypting a message with a private key provides ________, while encrypting with the receiver's public key provides ________?

1) Confidentiality, Integrity
2) Authentication, Confidentiality
3) Integrity, Authentication
4) Confidentiality, Authentication

Answer 1

The correct answer is that encrypting with a private key provides authentication, as it acts as a digital signature, while encrypting with a receiver's public key ensures confidentiality, allowing only the intended recipient to decrypt the message.

Step-by-step explanation:

Encrypting a message with a private key provides authentication, because it proves that the message was created by the owner of the private key, and is thus a form of digital signature. On the other hand, encrypting a message with the receiver's public key ensures confidentiality because only the receiver's corresponding private key can decrypt the message, ensuring that only the intended recipient can read it.

The correct answer to the question is Encrypting a message with a private key provides Authentication, while encrypting with the receiver's public key provides Confidentiality, so the correct option is 4) Confidentiality, Authentication.