Cyber Attack Countermeasures : Module 4

 Cyber Attack Countermeasures : Module 4 Quiz

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1.

Question 1

CBC mode cryptography involves which of the following?

1 / 1 point

Mediation of overt channels

Mediation of covert channels

Auditing of overt channels

Auditing of covert channels

None of the above

Correct

Correct! CBC mode is specifically designed to close covert communication channels in block encryption algorithms.

2.

Question 2

Which is a true statement?

1 / 1 point

Conventional crypto scales perfectly well

Conventional crypto scales poorly to large groups

Conventional crypto does not need to scale

All of the above

Correct

Correct! The symmetric key based method inherent in conventional cryptography does not scale well to large groups.

3.

Question 3

Public Key Cryptography involves which of the following?

1 / 1 point

Publicly known secret keys

Publicly known private keys

Publicly known public keys

All of the above

Correct

Correct! Public keys, by definition, are publicly known.

4.

Question 4

Which is a true statement?

1 / 1 point

Encryption with secret key requires decryption with the corresponding public key

DES is more expensive than public key crypto

Public key crypto absolutely requires hardware implementation

All of the above

Correct

This is a correct statement!

5.

Question 5

Public Key Cryptography accomplishes secrecy through which of the following?

1 / 1 point

Decryption with the KDC’s secret key

Encryption with the sender’s private key

Decryption with the sender’s private key

Encryption with the recipient’s public key

All of the above

Correct

Correct! Secrecy is accomplished via encrypting with the public key of the recipient.

6.

Question 6

Public Key Cryptography accomplishes digital signatures which of the following?

1 / 1 point

Decryption with the KDC’s public key

Encryption with the sender’s secret key

Through bank e-Commerce

All of the above.

Correct

Correct! A digital signature is accomplished by encrypting with the sender’s secret key.

7.

Question 7

Which is a true statement?

1 / 1 point

Sent messages are encryption keys in Diffie-Hellman

Diffie-Hellman combines secrecy and digital signature

Diffie and Hellman received the Turing Award for their work

All of the above

Correct

Correct! All are true statements.

8.

Question 8

Certification authorities support public key management through what means?

1 / 1 point

Issuing keys

Binding names to addresses

Binding names to public keys

None of the above

Correct

Correct! CAs bind names to public keys and the result is a certificate.

9.

Question 9

Secure Sockets Layer (SSL) relies on which of the following?

1 / 1 point

Packet design

Browsers

Server hardware

All of the above

Correct

Correct! SSL relies on certificate being embedded in browsers.

10.

Question 10

James Ellis and Clifford Cocks deserve credit for which of the following?

1 / 1 point

Keeping secrets

Having integrity

Inventing secret encryption (essentially public key technology)

All of the above

Correct

Correct! In addition to inventing public key technology, they also showed great honest and integrity by not compromising secret government information.