CRYPTOGRAPHY

Question 1

C = Ek(P); P = Dk(C)

Accepted Answer

encryption and decryption process of plaintext

Question 2

In __ and __ cryptography is necessary when communicating over any untrusted medium

Accepted Answer

data/telecommunications

Question 3

is a info-theoretically secure solution to the key exchange problem.

Accepted Answer

quantum key distribution

Question 4

Ensuring that no one can read the message except the intended receiver

Accepted Answer

Privacy/confidentialit

Question 5

Exchanges use the same path as the other data

Accepted Answer

In-band key exchanges

Question 6

Symmetric and asymmetric algorithms (steps) part of the encryption process of cryptography?

Accepted Answer

True

Question 7

The encryption algorithm is simply the XOR operation AND sometimes combined with MD5 (random)

Accepted Answer

one-time pad

Question 8

cryptographic key exchange process in which a key is held in escrow, or stored,by a third party

Accepted Answer

Key escrow

Question 9

The process of proving one's identity

Accepted Answer

Authentication

Question 10

___are sometimes called symmetric keys, because 1 key is used 4 both encryption and decryptio

Accepted Answer

Session Key

Question 11

The amount of resources and time it takes for the algorithm to operate refers to the:

Accepted Answer

The work factor of an algorithm

Question 12

The technique uses both symmetric and asymmetric algorithms

Accepted Answer

Session keys

Question 13

A mechanism to prove that the sender really sent this message

Accepted Answer

Non-repudiation

Question 14

The method by which crypto keys are shared between sender and receiver

Accepted Answer

Key exchange

Question 15

CRYPTOGRAPHIC APPLICATIONS : PGP, GNUPG/GPG, PAP/CHAP, NT LAN MANAGER, WIRELESS, AND OTP

Accepted Answer

TRUE

Question 16

is a software package provides encryption and auth. for e-mail and file storage applications

Accepted Answer

PGP

Question 17

he practice of concealing messages or information within other nonsecret text or data

Accepted Answer

steganography

Question 18

Which type of key use can be faster and more efficient than using asymmetric encryption alone?

Accepted Answer

Session key

Question 19

Exchanges use a different path

Accepted Answer

out-of-band exchanges

Question 20

The term __ refers to something that takes place outside the normal communication channel

Accepted Answer

out-of-band

Question 21

Plaintext is encrypted into ___

Accepted Answer

CIPHERTEXT

Question 22

Assuring the receiver that the received message has not been altered in any way

Accepted Answer

Integrity

Question 23

Encryption is the idea that packets R encrypted at the source and decrypted at the destination

Accepted Answer

EE2E

Question 24

Unencrypted data, referred to as ___

Accepted Answer

PLAINTEXT

Question 25

There are five primary functions of cryptography today

Accepted Answer

TRUE

Question 26

What are the two types of key exchanges?

Accepted Answer

In-band and out-of-band

Question 27

"stretches" weak keys to make them stronger against brute force attacks

Accepted Answer

key stretching

Question 28

is the science of exploiting quantummechanical properties to perform cryptographic tasks

Accepted Answer

Quantum cryptography

Question 29

Digital signature algorithm or ___ is based on Digital Signature Standard

Accepted Answer

DSA

Question 30

is the cornerstone of computer and communications security

Accepted Answer

Modern cryptography

Question 31

Block ciphers can operate in one of several modes; CBC, ECB, CFB, OFTB, AND CTR

Accepted Answer

True

Question 32

Block ciphers are different from stream ciphers bc it uses a "block-by-block" not "bit-by-bit"

Accepted Answer

True

CRYPTOGRAPHY

Questions 32

CRYPTOGRAPHY

Questions 32