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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Fides: Lightweight Authenticated Cipher with Side-Channel Resistance for Constrained Hardware
verfasst von : Begül Bilgin, Andrey Bogdanov, Miroslav Knežević, Florian Mendel, Qingju Wang
Erschienen in: Cryptographic Hardware and Embedded Systems - CHES 2013
Verlag: Springer Berlin Heidelberg
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In this paper, we present a novel lightweight authenticated cipher optimized for hardware implementations called
Fides
. It is an online nonce-based authenticated encryption scheme with authenticated data whose area requirements are as low as 793 GE and 1001 GE for 80-bit and 96-bit security, respectively. This is at least two times smaller than its closest competitors Hummingbird-2 and Grain-128a. While being extremely compact,
Fides
is both throughput and latency efficient, even in its most serial implementations. This is attained by our novel sponge-like design approach. Moreover, cryptographically optimal 5-bit and 6-bit S-boxes are used as basic nonlinear components while paying a special attention on the simplicity of providing first order side-channel resistance with threshold implementation.