IAS CH6 QUIZ

Once the plaintext is converted to ciphertext using the encryption algorithm the plaintext is then used as input and the algorithm is applied again

• T

• F

A mode of operation is a technique for enhancing the effect of a  cryptographic algorithm or adapting the algorithm for an     application. 

• T

• F

The XTS-AES standard describes a method of decryption for data         stored in sector-based devices where the threat model includes         possible access to stored data by the adversary. 

• T

• F

S-AES is the most widely used multiple encryption scheme. 

• T

• F

Given the potential vulnerability of DES to a brute-force attack, an         alternative has been found. 

• T

• F

There are no practical cryptanalytic attacks on 3DES.

• T

• F

A number of Internet based applications have adopted two-key

3DES, including PGP and S/MIME.

• T

• F

The sender is the only one who needs to know an initialization

vector.

• T

• F

A typical application of Output Feedback mode is stream oriented

transmission over noisy channel, such as satellite communication.

• T

• F

Cipher Feedback (CFB) is used for the secure transmission of

single values.

• T

• F