domain 3 set 1

Question 1

Digital signature require what?

Answer 1

Public Key infrastructures (PKI)

Question 2

X.509 V.4 is for what?

Answer 2

Certificate Standard

Question 3

HMAC

Answer 3

Hashed Message Authentication Code (no PKI Used)

Question 4

Certificates are Digitally signed by who?

Answer 4

(CA) Certificate Authority

Question 5

The steps in a SSL / TLS connection?

Answer 5

1. The client makes a SSL Session
2. The Server provides its Certificate with its public key
3. the client encrypts with the servers public key
4. the server decrypts wit it’s private key.

Question 6

Main Hashing Algorithms and bit size

Answer 6

1. MD-5 128 bits
2. SHA-1 160 Bits
3. SHA-256 256 Bits

Question 7

OCSP ?

Answer 7

Online Certificate Status Protocol ( Certificate Revocation)

Question 8

How to tell if a Certificate has been Revoke

Answer 8

1. Online Certificate Status Protocol (OCSP)2. CRL (downloadable list from CA)

Question 9

Two Documents produce the same Hashed # ?

Answer 9

A collisions

Question 10

An Attempt to Cause Collisions

Answer 10

Birthday Attacks (Hashing)

Question 11

Certificates help to prevent what ?

Answer 11

Man in the middle attacks

Question 12

Symmetric Stream Crypto

Answer 12

RC-4 Used on WEP

Question 13

4 parts of the Public Key infrastructures (PKI)

Answer 13

1. (CA) Certificate Authority
2. (RA) Registration Authority
3. Certificate Repository
4. Certificate Revocation list

Question 14

A Very Efficient Crypto?

Answer 14

ECC Elliptical Curve Cryptography

Question 15

what Cryptography is used on Low CPU powered devices?

Answer 15

ECC Elliptical Curve Cryptography

Question 16

Secure Key-Agreement Without Pre-shared Secrets

Answer 16

Diffie Hellman

Question 17

First Asymmetric Algorithm

Answer 17

Diffie Hellman

Question 18

Use Factorization

Answer 18

RSA use a Trap-Door function for it

Question 19

Digital signature use what Algorithm

Answer 19

RSA

Question 20

What are the 6 Asymmetric Algorithm

Answer 20

1. RSA
2. DSA
3. ECC = Elliptical Curve Cryptography
4. El Gamall
5. DH = Diffie Hellman
6. Knapsack

Question 21

Bulk Encryption use What Cryptography Type?

Answer 21

Symmetric

Question 22

Cryptography used for Key Encryption and distribution

Answer 22

Asymmetric

Question 23

Asymmetric Algorithm Key Formula

Answer 23

2N

Question 24

Symmetric Algorithm Key Formula

Answer 24

N=(N-1) /2

Question 25

SSL / TLS use what for Key Exchange

Answer 25

Asymmetric Algorithm

Question 26

SSL / TLS use what for Data Exchange

Answer 26

Symmetric Algorithm

Question 27

In Asymmetric How do we get Authenticity?

Answer 27

Senders Private Key

Question 28

In Asymmetric How do we get Non-Repudiation?

Answer 28

Hash Encrypted by Senders Private Key

Question 29

In Asymmetric How do we get Privacy?

Answer 29

Receivers’s Public Key

Question 30

What is a Digital signature made with?

Answer 30

A hash with the Sender’s Private Key

Question 31

A Private Key Crypto?

Answer 31

Asymmetric

Question 32

DEA is what crypto?

Answer 32

DES

Question 33

DES true key bit size?

Answer 33

56 bit

Question 34

DES
Bit size
# of Rounds

Answer 34

symmetric
64 bit block size
16 rounds
Block crypto