Question 9 Digital signatures do not allow for: Unauthorized modification to a m
ID: 3911689 • Letter: Q
Question
Question 9
Digital signatures do not allow for:
Unauthorized modification to a message
Third-party verification of a sender
Confidentialty of a document
Authentication of the sinatory
Question 1
The DES algorithm uses a series of ------------- on blocks of 64 bits using a 64 bit key.
additions
permutations and substitutions
divisions
multiplications
Question 2
Which of the following encryption algorithm uses variable block size, key size and number of rounds?
IDES
RC5
AES
BLOWFISH
Question 3
Which of the following does support variable block sizes?
RC5
Rijndael
IDEA
Triple-DES
Question 4
Which of the following is a passive attack?
Release of message content
Data Modification
Data Delay
Data Copy
Question 5
Which of the following is not commonly used by encrytion systems?
Transformation
Diffusion
Transposition
Substitution
Unauthorized modification to a message
Third-party verification of a sender
Confidentialty of a document
Authentication of the sinatory
Question 1
The DES algorithm uses a series of ------------- on blocks of 64 bits using a 64 bit key.
additions
permutations and substitutions
divisions
multiplications
Question 2
Which of the following encryption algorithm uses variable block size, key size and number of rounds?
IDES
RC5
AES
BLOWFISH
Question 3
Which of the following does support variable block sizes?
RC5
Rijndael
IDEA
Triple-DES
Question 4
Which of the following is a passive attack?
Release of message content
Data Modification
Data Delay
Data Copy
Question 5
Which of the following is not commonly used by encrytion systems?
Transformation
Diffusion
Transposition
Substitution
Explanation / Answer
We are required to do only 4 parts of a question
9. The correct option is c. Confidentialty of a document
1. The correct option is b. permutations and substitutions
2. The correct option is c. RC5
3. The correct option is a. RC5