Question 1

If both sender and receiver use the same key, the system is referred to as:

Accepted Answer

A)   public-key encryption
B)   two-key
C)   asymmetric
D)   conventional encryptionE) A) and B)
F) C) and D)

Question 2

the most widely used cipher is the Data Encryption Standard.

Accepted Answer

A) True 
 B)False

Question 3

On average, half of all possible keys must be tried to achieve
success with a brute-force attack.

Accepted Answer

A) True 
 B)False

Question 4

the process of converting from plaintext to ciphertext is known as
deciphering or decryption.

Accepted Answer

A) True 
 B)False

Question 5

Joseph Mauborgne proposed an improvement to the Vernam cipher that uses a random key that is as long as the message so that the key does not need to be repeated.the key is used to encrypt and decrypt a single message and then is discarded.Each new message requires a new key of the same length as the new message.this scheme is known as a(n)  __________ .

Accepted Answer

A)   pascaline
B)   one-time pad
C)   polycipher
D)   enigmaE) All of the above
F) C) and D)

Exam 3: Classical Encryption Techniques

the most widely used cipher is the Data Encryption Standard.

Correct Answer
verified

If both sender and receiver use the same key, the system is referred to as:

Correct Answer
verified

On average, half of all possible keys must be tried to achieve success with a brute-force attack.

Correct Answer
verified

Correct Answer
verified

the process of converting from plaintext to ciphertext is known as deciphering or decryption.

Correct Answer
verified

Exam 3: Classical Encryption Techniques

the most widely used cipher is the Data Encryption Standard.

Correct AnswerverifiedShow Answer

If both sender and receiver use the same key, the system is referred to as:

Correct AnswerverifiedShow Answer

On average, half of all possible keys must be tried to achieve success with a brute-force attack.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

the process of converting from plaintext to ciphertext is known as deciphering or decryption.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified