Network Security - Module 16

What is Origin Authentication in communications?

• Guarantees that the message was not altered. Any changes to data in transit will be detected.

• Guarantees that the message is not a forgery and does actually come from whom it states.

• Guarantees that only authorized users can read the message. If the message is intercepted, it cannot be deciphered.

• Guarantees that the sender cannot repudiate, or refute, the validity of a message sent.

Which of the following only encrypts data and does not decrypt data?

• Hashing

• Asymmetric encryption

• Symmetric encryption

• All of them

What is Data Integrity in communications?

• Guarantees that the message was not altered. Any changes to data in transit will be detected.

• Guarantees that the message is not a forgery and does actually come from whom it states.

• Guarantees that only authorized users can read the message. If the message is intercepted, it cannot be deciphered.

• Guarantees that the sender cannot repudiate, or refute, the validity of a message sent.

What is Data confidentiality in communications?

• Guarantees that the message was not altered. Any changes to data in transit will be detected.

• Guarantees that the message is not a forgery and does actually come from whom it states.

• Guarantees that only authorized users can read the message. If the message is intercepted, it cannot be deciphered.

• Guarantees that the sender cannot repudiate, or refute, the validity of a message sent.

Which of the following uses a different key to encrypt and decrypt data?

• Hashing

• Asymmetric encryption

• Symmetric encryption

• All of them

What is non-repudiation in communications?

• Guarantees that the message was not altered. Any changes to data in transit will be detected.

• Guarantees that the message is not a forgery and does actually come from whom it states.

• Guarantees that only authorized users can read the message. If the message is intercepted, it cannot be deciphered.

• Guarantees that the sender cannot repudiate, or refute, the validity of a message sent.

Which of the following needs to have the longest key to be comparably safe?

• Hashing

• Asymmetric encryption

• Symmetric encryption

• They all need the same key length

Which method is used to securely agree a shared secret or key between 2 devices?

• Iffy-Hellmann's

• Squiffy-Hooligan

• Dickie-Hellion

• Diffie-Hellman

• None of these, you've lost your marbles!