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The more popular and widely adopted symmetric encryption algorithm likely to be encountered nowadays is the Advanced Encryption Standard (AES). It is found at least six time faster than triple DES.

AES is an iterative rather than Feistel cipher. It is based on ‘substitution–permutation network’.

The features of AES are as follows −

  • Symmetric key symmetric block cipher
  • 128-bit data, 128/192/256-bit keys
  • Stronger and faster than Triple-DES
  • Provide full specification and design details
  • Software implementable in C and Java
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