Quiz 7

The process of transforming ciphertext to plaintext is known as:

Which of the following statements is true about the Vernam cipher:

What is the minimum key length for a one-time pad?

All of the following statements about the polyalphabetic cipher are true EXCEPT:

A running-key cipher can be used when:

In modulo arithmetic, when A – B

A computer user is listening to an audio broadcast on the Internet through an SSL VPN. The type of encryption cipher used in this case is:

In an electronic codebook (ECB) cipher, each block of ciphertext:

The encryption mode where ciphertext output from each encrypted plaintext block in the encryption used for the next block is known as:

Public key cryptography is another name for:

Public key cryptography is so-named because:

A security manager is searching for an encryption algorithm to be used to encrypt data files containing sensitive information. Which of the following algorithms should NOT be considered:

A particular encryption algorithm transforms plaintext to ciphertext by XORing the plaintext with the encryption key. This is known as:

Two parties that have never communicated before wish to send messages using symmetric encryption key cryptography. How should the parties begin?

Two parties that have never communicated before wish to send messages using asymmetric key cryptography. How should the parties begin?

Two parties, Party A and Party B, regularly exchange messages using public key cryptography. One party, Party A, believes that its private encryption key has been compromised. What action should Party B take?

The Advanced Encryption Standard is another name for which cipher:

The Data Encryption Standard:

Two parties are exchanging messages using public key cryptography. Which of the following statements describes the proper procedure for transmitting an encrypted message?

A stream cipher encrypts data by XORing plaintext with the encryption key. How is the ciphertext converted back into plaintext?

The purpose of digitally signing a message is to ensure:

The purpose of digitally signing a message is to ensure:

The purpose of the Diffie-Hellman key exchange protocol is:

An attacker is attempting to learn the encryption key that is used to protect messages being sent between two parties. The attacker is able to create his own messages, get them encrypted by one of the parties, and can then examine the ciphertext for his message. This type of attack is known as:

Which is the best approach for two parties who wish to establish a means for confirming the confidentiality and integrity of messages that they exchange: