Encryption quiz

Who used the first well-known substitution cipher?

• A military leader

• Al-Kindi

• Julius Caesar

• Alice and Bob

What basic principle did the Caesar Cipher use for encrypting messages?

• Encrypting with a key

• Replacing each letter with a symbol

• Shifting each letter by a set number

• Using a special codebook

Who published the weakness of the Caesar Cipher?

• An Arab mathematician

• A Greek philosopher

• A Roman scholar

• A European scientist

What method did Al-Kindi use to break the Caesar Cipher?

• Brute force attack

• Mathematical equations

• Psychological manipulation

• Frequency analysis

What is considered a 'fingerprint' of a language according to the text?

• The frequency of each letter

• The number of speakers

• The vocabulary size

• The grammar rules

Which of the following is not a characteristic of a strong encryption algorithm?

• High speed and low complexity

• Resistance to all known types of cryptanalytic attacks

• Use of large keys to increase security

• Easy to decrypt by unauthorized users

What is encryption?

• Building tombs

• Protecting data by scrambling it

• Unscrambling data to read it

• Exploring church basements

What do you call the algorithm used to encrypt data?

• Flux capacitor

• Oscillation overthruster

• Cipher

• Transmogrifier

What do we call scrambled, encrypted data?

• Garbage

• Ciphertext

• Plaintext

• Gibberish

What do we call unscrambled, readable data?

• ASCII

• Ciphertext

• Plaintext

• Purple prose