Unit 3

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Across
  1. 3. A modern cipher is usually a complex _____cipher made of a combination of different simple ciphers.
  2. 5. A(n) ______ is a keyless substitution cipher with N inputs and M outputs that uses a formula to define the relationship between the input stream and the output stream.
  3. 6. DES uses a key generator to generate sixteen _______ round keys.
Down
  1. 1. DES has _____ different configurations.
  2. 2. A combination of an encryption algorithm and a decryption algorithm is called a ________.
  3. 4. _______ is a round cipher based on the Rijndael algorithm that uses a 128-bit block of data.
  4. 7. ECB and CBC are ________ ciphers.