Block cipher apparatus using auxiliary transformation

Details Block cipher apparatus using auxiliary transformation Block cipher apparatus using auxiliary transformation

2005-10-28

2010-10-26

Vu, Kimyen (Department: 2435)

Cryptography

Particular algorithmic function encoding

C380S029000

Reexamination Certificate

active

07822196

ABSTRACT:
It is desired to share one circuit by an encryption unit200and a decryption unit500. A normal data transformation unit (FL)251and an inverse data transformation unit (FL−1)273are located at point symmetry on a non-linear data transformation unit220, and a normal data transformation unit (FL)253and an inverse data transformation unit (FL−1)271are located at point symmetry on the non-linear data transformation unit220. Therefore, the encryption unit200and the decryption unit500can be configured using the same circuits.

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