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Published in:
2013 | OriginalPaper | Chapter
Multipurpose Cryptographic Primitive ARMADILLO3
Authors : Petr Sušil, Serge Vaudenay
Published in: Smart Card Research and Advanced Applications
Publisher: Springer Berlin Heidelberg
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This paper describes a new design of the multipurpose cryptographic primitive
ARMADILLO3
and analyses its security. The
ARMADILLO3
family is oriented on small hardware such as smart cards and RFID chips. The original design
ARMADILLO
and its variants were analyzed by Sepehrdad et al. at CARDIS’11, the recommended variant
ARMADILLO2
was analyzed by Plasencia et al. at FSE’12 and by Abdelraheem et al. at ASIACRYPT’11. The
ARMADILLO3
design takes the original approach of combining a substitution and a permutation layer. The new family
ARMADILLO3
introduces a reduced-size substitution layer with 3 ×3 and 4 ×4 S-boxes, which covers the substitution layer from 25% to 100% of state bits, depending on the security requirements. We propose an instance
ARMADILLO3-A1/4
with a pair of permutations and S-boxes applied on 25% of state bits at each stage.