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Paper: Square Attacks on Reduced-Round Variants of the Skipjack Block Cipher

Authors:
Jorge Nakahara Jr
Bart Preneel
Joos Vandewalle
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URL: http://eprint.iacr.org/2002/003
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Abstract: This report surveys on a series of Square attacks on reduced-round versions of the Skipjack block cipher. {\bf Skipjack} is an iterated block cipher encrypting 64-bit plaintext blocks into 64-bit ciphertext blocks, using an 80-bit key. Its design is based on a generalized Feistel Network making up 32 rounds of two different types. This cipher was developed by the National Security Agency for the Clipper chip and Fortezza PC card.
BibTeX
@misc{eprint-2002-11528,
  title={Square Attacks on Reduced-Round Variants of the Skipjack Block Cipher},
  booktitle={IACR Eprint archive},
  keywords={secret-key cryptography / cryptanalysis, block ciphers},
  url={http://eprint.iacr.org/2002/003},
  note={ jorge.nakahara@esat.kuleuven.ac.be 11695 received 4 Jan 2002, last revised 8 Jan 2002},
  author={Jorge Nakahara Jr and Bart Preneel and Joos Vandewalle},
  year=2002
}