Encryption/decryption Device, Encryption/decryption Method, And Computer Program

  • Published: Oct 1, 2008
  • Earliest Priority: Jan 17 2006
  • Family: 8
  • Cited Works: 0
  • Cited by: 5
  • Cites: 0
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Abstract

It is possible to realize a Feistel-type common key block encryption/decryption processing configuration capable of reducing data stored in a memory at a low cost. The Feistel-type common key block encryption/decryption processing repeatedly executes an SP-type F function having nonlinear and linear transform sections by several rounds. At least one of the nonlinear and linear transform processes executed in the F function in each round is executed as a transform process identical with a transform process applied to an encryption/decryption algorithm other than a Feistel-type common key block encryption/decryption algorithm and/or another hash function such as AES and Whirlpool. With this configuration, it is possible to reduce the design cost and the amount of data stored in a memory.


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Document History
  • Publication: Oct 1, 2008
  • Application: Jan 4, 2007
    EP EP 07706356 A
  • Priority: Jan 4, 2007
    JP 2007050009 W
  • Priority: Jan 17, 2006
    JP 2006008695 A

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