Introduction to Cryptography Quiz

What is cryptography?

• Cryptography is a type of physical exercise.
• Cryptography is the study of ancient languages.
• Cryptography is the practice of securing information through techniques like encryption.
• Cryptography is a method of cooking food.

What is the origin of cryptography usually dated from?

• Ancient Egypt, around 1900 BC
• Medieval Europe, around 1200 AD
• Ancient Greece, around 500 BC
• Renaissance Italy, around 1500 AD

Who was the first known user of a modern cipher?

• Julius Caesar
• Leonardo da Vinci
• Albert Einstein
• Isaac Newton

What is the Caesar cipher?

• A simple substitution cipher

• A complex encryption method

• A type of digital signature

• A method of data compression

What happens when you shift letters in a Caesar cipher?

• They become unreadable

• They are replaced by numbers

• They correspond to another letter

• They are encrypted with a key

What is the formula for the Caesar cipher encryption?

• C = (P / k) mod 26
• C = (P * k) mod 26
• C = (P - k) mod 26
• C = (P + k) mod 26

What is a keyed Caesar cipher?

• A cipher that uses a passphrase

• A cipher that is impossible to break

• A cipher that uses numbers only

• A cipher that requires a key

What is one method of breaking a Caesar cipher?

• Frequency analysis

• Using a complex algorithm

• Creating a new cipher

• Encrypting with a key

What is the ROT13 system?

• A special case of the Caesar cipher

• A type of digital encryption

• A method of data compression

• A historical cipher

What is the Vigenère Cipher?

• A method of encrypting text using a single letter substitution.
• A technique for decoding Morse code using a keyword.
• The Vigenère Cipher is a method of encrypting text using a keyword for polyalphabetic substitution.
• A simple algorithm for reversing text without encryption.