Paper 2002/003
Square Attacks on Reduced-Round Variants of the Skipjack Block Cipher
Jorge Nakahara Jr, Bart Preneel, and Joos Vandewalle
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.
Note: Newest version with new revised complexity summary table at the end of the paper. It is a bit long, but fully-illustrated :-)
Metadata
- Available format(s)
- PS
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- cryptanalysisblock ciphers
- Contact author(s)
- jorge nakahara @ esat kuleuven ac be
- History
- 2002-01-08: revised
- 2002-01-04: received
- See all versions
- Short URL
- https://ia.cr/2002/003
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2002/003,
author = {Jorge Nakahara Jr and Bart Preneel and Joos Vandewalle},
title = {Square Attacks on Reduced-Round Variants of the Skipjack Block Cipher},
howpublished = {Cryptology {ePrint} Archive, Paper 2002/003},
year = {2002},
url = {https://eprint.iacr.org/2002/003}
}