Codes and ciphers Flashcards
1
Q
What is a code?
A
Mapping one concept to another for easier transmission.
2
Q
What is a cipher?
A
An algorithmic method of symbol manipulation.
3
Q
What is Kerckhoff’s Principle?
A
A system should remain secure even if everything but the key is public.
4
Q
What is the Caesar Cipher?
A
A substitution cipher that shifts letters by a fixed amount.
5
Q
What is a polyalphabetic cipher?
A
Uses multiple Caesar ciphers based on a key.
6
Q
What is a one-time pad?
A
A truly random key used once, offering perfect secrecy.
7
Q
What is the Enigma machine?
A
A mechanical cipher device using rotors and plugboards.
