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UGC NET CSE | December 2013 | Part 3 | Question: 32

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Find the false statement:

  1. In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption.
  2. The symmetric cipher DES (Data Encryption Standard) was widely used in the industry for security product.
  3. The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits.
  4. Public key algorithms use two different keys for Encryption and Decryption
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The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 128 bits , 192 bits and 256 bits .

56 is used by DES.

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