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Cryptography Key Terminologies Quiz

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Questions and Answers

What is the purpose of the secret key in encryption?

To decrypt the ciphertext (correct)
To transform the plaintext to the ciphertext
To generate the ciphertext
To choose the encryption algorithm

What is the primary function of the decryption algorithm?

To scramble the message
To create the ciphertext
To produce the original plaintext (correct)
To encrypt the plaintext

What is the main characteristic of the Caesar cipher?

Involves simple mapping or substitution (correct)
Uses a secret key for encryption
Operates using a transposition technique
Produces random stream of data

What does the substitution technique in cryptography involve?

Replacing plaintext units with another unit based on a predefined system (C) Signup and view all the answers

What is the basic idea of a transposition cipher?

Shuffling the positions of characters based on a specific rule (C) Signup and view all the answers

How does the Columnar Transposition technique rearrange the plaintext?

It writes out the plaintext in rows and then reorders the columns (C) Signup and view all the answers

What is the recipient required to know in order to decrypt a message encrypted using Columnar Cipher?

The order of columns (the key) (C) Signup and view all the answers

What is the purpose of choosing a key in the encryption process of Columnar Cipher?

To determine the order in which the columns will be read (D) Signup and view all the answers

How many rows are needed for the Rail Fence cipher with a keyword of six letters?

7 (C) Signup and view all the answers

What is the key in the Rail Fence cipher?

Number of rows used (D) Signup and view all the answers

Which cipher rearranges the characters of a message based on a pattern resembling a zigzag or rail fence?

Rail Fence Cipher (A) Signup and view all the answers

How is the plaintext 'DEFEND THE EAST WALL' encrypted using the Rail Fence cipher?

The message is written on alternate lines across the page (D) Signup and view all the answers

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