Cryptography CYS 1

This is an electro-mechanical device used by British cryptologists to help decipher encrypted secret messages during World War

• Bombe machine

• Enigma machine

• Lorenz ciphers machine

• Turing Machine

Substitution cipher is a type of .............

• Symmetric key Encryption

• Asymmetric key Encryption

High-throughput applications and Wireless communications uses........................................

• Stream Ciphers

• Block Ciphers

Which of the following is the NOT correct example encryption algorithm

• AES--> Symmetric Encryption

  RSA --> Asymmetric Encryption

• DES--> Symmetric Encryption

  Diffie Hellman --> Asymmetric Encryption

• 3DES--> Symmetric Encryption

  ECC --> Asymmetric Encryption

• Diffie Hellman--> Symmetric Encryption

  RC4 --> Asymmetric Encryption

Plain text : STOP GLOBAL WARMING

Cipher text : RSNO FKNAZK VZQLHMF

What is the Key if the plain text is encrypted using caeser cipher

• 1

• 2

• 23

• 20

Decode the Rail fence cipher

ATBAN5MIAYENTO22RCRI0

key height is 3

(a)  

Plain text: cryptography

identify the key size if the cipher text is: CPGPRTRHYOAY

• 3

• 5

• 4

• 2