MOD 4

Question 1

What is it called when you send stuff on the Internet or save it to your hard drive in its standard form?

Answer 1

“In the clear” or plain text

Question 2

What is the physical and logic way the message is being sent?

Answer 2

Transmission Medium

Question 3

What prevents a message from reaching the recipient?

Answer 3

Block

Question 4

What is it called when an Outsider reads the message (confidentiality lost)?

Answer 4

Intercept

Question 5

What is it called when an Outsider changes the message? (integrity lost)

Answer 5

Modify

Question 6

What is it called when an Outsider makes a message that looks like it came from the sender? (integrity lost)?

Answer 6

Fabricate

Question 7

What is encoding a message so its meaning isn’t obvious?

Answer 7

Encryption

Question 8

What is transforming an encrypted message into plaintext?

Answer 8

Decryption

Question 9

What encrypts and decrypts?

Answer 9

Cryptosystem

Question 10

What is C = E(P)

Answer 10

Cyphertext = Encryption Rule (PlainText)

Question 11

What kind of encryption where both encryption and decryption keys are the same?

Answer 11

Symmetric Encryption

Question 12

What kind of encryption where both encryption and decryption keys are different?

Answer 12

Asymmetric Encryption

Question 13

What is encrypting without a key?

Answer 13

Keyless Cipher

Question 14

What comes from Greek kryptos and means to stay hidden?

Answer 14

Cryptography

Question 15

Who studies encryption and encrypted messages?

Answer 15

Cryptanalyst

Question 16

Who works for a legimate sender?

Answer 16

Cryptographer

Question 17

What is research and study of encryption and decryption?

Answer 17

Cryptology

Question 18

What is Crypto Convention?

Answer 18

A + 3 = D
K - 1 = J

Question 19

Which cipher substitutes a character/symbol for each character of the message?

Answer 19

Substitution Ciphers

Question 20

How does pig latin work as a substitution cipher?

Answer 20

any words with vowels and consonants end with “ay”

Question 21

What is Caesar Cipher?

Answer 21

shifting a letter by 3
A + 3 = D

Question 22

What are some weaknesses for Caesar Cipher?

Answer 22

retains spacing between words and reveals double letters

Question 23

What is deciphered with a pre-arrranged chart that relies on a key?

Answer 23

Vigenere Tableau

Question 24

What is a perfect encryption that uses a duplicate pad of random, large, non-repeating keys?

Answer 24

One-Time Pads