Network Communication Authentication Worksheet

Disclosure

Traffic analysis

Content modification

Data compression

The content of the messages

The frequency and duration of connections

The secret key used for encryption

The source IP address

To encrypt the entire message

To provide confidentiality

To produce an authenticator

To modify the content of a message

MAC uses a key, while a hash function does not

Hash function uses a key, while a MAC does not

MAC is a public function, while a hash function is secret

They both use keys and are secret functions

Authentication and confidentiality

Confidentiality only

Authentication only

Digital signature

It is too slow

It only provides confidentiality

Anyone can use the receiver's public key to send a message

It requires a complex algorithm

Confidentiality

Authentication or Digital Signature

Both confidentiality and authentication

Neither authentication nor confidentiality

The receiver cannot determine whether the packet decrypted contains some useful message or random bits.

The algorithm is too simple.

To increase the message size

To provide confidentiality

To detect changes to the message

To speed up the encryption process

To encrypt the message

To generate the MAC

To decrypt the message

To provide confidentiality