Asymmetric and Hybrid Encryption Concepts

What is a key pair in asymmetric encryption?

• A set of two identical keys used for encryption and decryption

• A single key used for both encryption and decryption

• A set of two different keys used for encryption and decryption

• A set of three keys used for encryption, decryption, and authentication

Which key is used to encrypt a message that only the intended recipient can decrypt?

• The recipient's public key

• The sender's public key

• The recipient's private key

• The sender's private key

What does encrypting a message with the sender's private key provide?

• Symmetric encryption

• Authentication

• Key exchange

• Confidentiality

What is the main limitation of using asymmetric encryption for bulk data transfers?

• It is less secure

• It is slower and more taxing on the CPU

• It requires more keys

• It cannot be used for encryption

What is hybrid encryption?

• Using only symmetric encryption for all data

• Using multiple symmetric keys for encryption

• Using only asymmetric encryption for all data

• Combining symmetric and asymmetric encryption for different purposes

How is a symmetric key securely shared in hybrid encryption?

• By using a hashing algorithm

• By using a pre-shared key

• By using the recipient's public key

• By using the sender's private key

Which protocols use hybrid encryption to protect bulk data transfers?

• SSL/TLS and IPsec

• SMTP and POP3

• DNS and DHCP

• HTTP and FTP

What is the purpose of a hashing algorithm in creating message signatures?

• To decrypt the message

• To generate a symmetric key

• To convert the message into a smaller fixed-width fingerprint

• To encrypt the entire message

What does a successful decryption of a message signature with the sender's public key prove?

• The message was encrypted with a symmetric key

• The message was encrypted with the sender's private key

• The message was encrypted with the sender's public key

• The message was encrypted with the recipient's private key

What property does a matching digest provide when verifying a message signature?

• Confidentiality

• Symmetric encryption

• Authentication

• Integrity