[Resource Topic] 2002/003: Square Attacks on Reduced-Round Variants of the Skipjack Block Cipher

Welcome to the resource topic for 2002/003

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

Authors: Jorge Nakahara Jr, Bart Preneel, 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.

ePrint: https://eprint.iacr.org/2002/003

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