Cryptography Techniques and Concepts

Cryptography Techniques and Concepts

University

7 Qs

quiz-placeholder

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Cryptography Techniques and Concepts

Cryptography Techniques and Concepts

Assessment

Quiz

Computers

University

Hard

Created by

Thangavel Murugan

Used 1+ times

FREE Resource

7 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary distinction between steganography and cryptography?

Steganography hides the existence of a message, while cryptography hides its meaning.

Steganography rearranges letters, while cryptography replaces them.

Steganography is an ancient technique, while cryptography is a modern invention.

Steganography uses physical concealment, while cryptography uses mathematical algorithms.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How did the Spartan Skytale cipher work to conceal messages?

A leather strip was wrapped around a wooden rod, and the message was written along the rod, appearing jumbled when unwrapped.

Letters were replaced with other letters based on a secret keyword.

Messages were hidden under a layer of wax on a wooden board.

The message was rearranged into an anagram that only the sender could decipher.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary vulnerability of a simple Caesar Shift Cipher?

It requires a complex keyword that is difficult to remember.

The limited number of possible shifts makes it susceptible to brute-force attacks.

It hides the existence of the message, making it easily discoverable.

The message becomes too long and difficult for the intended receiver to untangle.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was Al-Kindi's significant contribution to cryptanalysis?

Inventing the first mechanical encryption device.

Developing the concept of public-key cryptography.

Pioneering the use of frequency analysis to break ciphers.

Creating the first polyalphabetic substitution cipher.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a primary limitation of using frequency analysis for cryptanalysis?

It only works for short messages.

It is ineffective against ciphers that use symbols instead of letters.

Its effectiveness is reduced when the text has an unusual distribution of letters.

It requires a known plaintext to be successful.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following techniques was introduced during the Renaissance to make ciphers more difficult to break?

One-time pads

Quantum encryption

Nulls and intentional misspellings

Enigma machines

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the fundamental difference between a code and a cipher in cryptography?

Codes replace words, while ciphers replace letters.

Codes are used for encryption, while ciphers are used for decryption.

Codes are digital, while ciphers are analog.

Codes are public, while ciphers are secret.