Atbash Cipher

What is the Atbash cipher?

• A substitution cipher where each letter is replaced by the letter opposite to it in the alphabet.

• A cipher that shifts letters by a fixed number of positions.

• A cipher that uses a keyword to rearrange the alphabet.

• A cipher that uses numbers to represent letters.

Which of the following is the Atbash cipher encoding of the word "HELLO"?

• SVVOD

• SVOOL

• HELLZ

• OOLLE

Decode the Atbash cipher text "ZGYZHS" to reveal the original message.

• ATBASH

• SECRET

• CIPHER

• DECODE

Explain how the Atbash cipher is different from the Caesar cipher.

• Atbash uses a fixed shift, while Caesar uses a variable shift.

• Atbash reverses the alphabet, while Caesar shifts the alphabet by a fixed number.

• Atbash uses numbers, while Caesar uses letters.

• Atbash uses a keyword, while Caesar does not.

In which historical context was the Atbash cipher originally used?

• Ancient Greek military communications

• Hebrew biblical texts

• Roman political messages

• Medieval European trade

What is the Atbash cipher equivalent of the letter "M"?

• N

• Z

• X

• N

If the Atbash cipher is applied twice to a message, what is the result?

• The message is reversed.

• The message is encoded with a Caesar cipher.

• The original message is restored.

• The message becomes unreadable.

How can the Atbash cipher be used in modern cryptography?

• As a primary encryption method for secure communications.

• As a simple puzzle or educational tool to demonstrate basic encryption concepts.

• As a method to encrypt digital data.

• As a replacement for public key cryptography.

Solve the Atbash puzzle: If "GSRH RH Z HVXIVG" is decoded, what is the message?

• THIS IS A SECRET

• THAT IS A PUZZLE

• THIS IS A MESSAGE

• THAT IS A CODE

Compare the Atbash cipher with the Vigenère cipher in terms of complexity.

• Atbash is more complex because it uses a keyword.

• Vigenère is more complex because it uses a keyword and a polyalphabetic system.

• Both are equally complex because they are substitution ciphers.

• Atbash is more complex because it uses a reverse alphabet.