Question 1

What does the word 'cryptography' mean?

Accepted Answer

Secret writing

Answer

Open reading

Answer

Public speaking

Answer

Light coding

Question 2

What is the process of making text secret called?

Accepted Answer

Encryption

Answer

Transposition

Answer

Rotation

Answer

Decryption

Question 3

Which historical figure used a Caesar cipher to encrypt private correspondence?

Accepted Answer

Julius Caesar

Answer

Cleopatra

Answer

Alexander the Great

Answer

Napoleon Bonaparte

Question 4

What is a big drawback of basic substitution ciphers?

Accepted Answer

Preserving letter frequencies

Answer

Complexity of use

Answer

Changing letter order

Answer

Long encryption time

Question 5

What encryption machine was famously used by the Nazis during World War II?

Accepted Answer

Enigma

Answer

Securitron

Answer

Cryptomaster

Answer

Ciphertron

Question 6

What cryptographic technique involves mixing secret colors to exchange keys?

Accepted Answer

Key exchange

Answer

Color coding

Answer

Secret sharing

Answer

Paint mixing

Question 7

What is the most common letter in the English language?

Accepted Answer

E

Answer

M

Answer

S

Answer

A

Question 8

What was the fatal cryptographic weakness of the Enigma machine?

Accepted Answer

A letter could not be encrypted as itself

Answer

Reflection circuit was faulty

Answer

Rotors were not configurable

Answer

Plugboard was missing

Question 9

What does AES stand for?

Accepted Answer

Advanced Encryption Standard

Answer

Adaptive Encryption Scheme

Answer

Automated Encryption Solution

Answer

Advanced Encoding System

Question 10

Encrypt the text PERIPHERAL using the Caesar Cipher and a shift of 5

Accepted Answer

UJWKTLJWFS

Answer

UJWMTKNWFS

Answer

JVMTKJWFS

Answer

QJSKXLFSTG

Question 11

Encrypt the text "SOFTWARE" using the Caesar Cipher with a shift of 3.

Accepted Answer

VRZWIUHF

Answer

VSWWIUHF

Answer

VSZWIUHF

Answer

C. VRZWIUIF

Question 12

Decrypt the following Caesar cipher code, which has been shifted by 3 positions: FDHVDU

Accepted Answer

CAESAR

Answer

JULIUS

Answer

MARCUS

Answer

BRUTUS

Question 13

What is the fundamental weakness of basic substitution ciphers?

Accepted Answer

preservation of letter frequencies

Answer

ease of decryption

Answer

limited character set

Answer

lack of key

Question 14

What is the purpose of the reflector in the Enigma machine?

Accepted Answer

connects every pin to another and sends the electrical signal back through the rotors

Answer

generate random keys

Answer

store encryption keys

Answer

encrypt messages

Question 15

What is the purpose of a permutation cipher?

Accepted Answer

to change the order of characters in a message

Answer

to encrypt using a grid

Answer

to substitute characters in a message

Answer

to preserve letter frequencies

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