Chapter 8

Question 1

What is a cryptography?

Answer 1

Cryptography is a process of making and using codes to secure the transmission of information

Question 2

What is cryptanalysis?

Answer 2

Its a process of obtaining the original message without the use of algorithms

Question 3

List of ciphers

Answer 3

Substitution
Vingenere
Transposition
XoR
Vernam
Book or Running key

Question 4

What is substitution cipher?

Answer 4

Substitutes one value for another one.

Question 5

What are the 2 types of substitution?

Answer 5

Monoalphabetic - one alphabet

Polyalphabetic - more complex 2 or more alphabets

Question 6

What is a vingenere cipher?

Answer 6

Advanced cipher type that uses simple polyalphabetic code, made up of 26 distinct cipher alphabets

Question 7

What is a transposition cipher?

Answer 7

Cipher that rearranges values within a block to create ciphertext

Question 8

What is a hash function?

Answer 8

Mathematical algorithms that generate message summary to confirm no content has change.

Question 9

What are hash algorithms?

Answer 9

Publicly known functions that create hash value