Untitled Quiz

What is the primary function of a cipher in cryptography?

• To store data securely

• To compress data

• To convert plaintext into ciphertext

• To authenticate users

Which cipher uses a grid to encrypt pairs of letters?

• Caesar Cipher

• Vigenère Cipher

• Playfair Cipher

• Morse Code

In the Caesar Cipher, how many positions is each letter shifted in the standard version?

• 1

• 3

• 5

• 26

What is a key characteristic of the One-Time Pad cipher?

• It uses a repeating key

• It is vulnerable to frequency analysis

• It is unbreakable when used correctly

• It requires a public key infrastructure

Which encoding method represents binary data using hexadecimal digits?

• Base64

• ASCII

• Hexadecimal

• Unicode

What is the purpose of frequency analysis in cryptography?

• To increase encryption speed

• To detect patterns in ciphertext

• To compress data

• To generate random keys

Which cipher replaces each letter with a different symbol or letter, possibly using multiple symbols for a single plaintext letter?

• Caesar Cipher

• Homophonic Substitution Cipher

• Vigenère Cipher

• Pigpen Cipher

What is the main advantage of the Vigenère Cipher over the Caesar Cipher?

• It uses numbers instead of letters

• It is easier to implement

• It uses a keyword to vary the shift, making it more secure

• It requires no key

In the context of data encoding, what does Base64 encoding do?

• Converts data into hexadecimal format

• Compresses data to reduce size

• Encodes binary data into ASCII characters

• Encrypts data using a 64-bit key

What is the primary use of Huffman coding in data processing?

• Encrypting messages

• Error detection

• Data compression

• Key generation