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- W2072667737 abstract "SFLASH was chosen as one of the final selection of the NESSIE project in 2003. It is one of the most efficient digital signature scheme and is suitable for implementation on memory-constrained devices such as smartcards. Side channel attacks (SCA) are a serious threat to memory-constrained devices. If the implementation on them is careless, the secret key may be revealed. In this paper, we experimentally analyze the effectiveness of a side channel attack on SFLASH. There are two different secret keys for SFLASH, namely the proper secret key (s, t) and the random seed Δ used for the hash function SHA-1. Whereas many papers discussed the security of (s, t), little is known about that of Δ. Steinwandt et al. proposed a theoretical DPA for finding Δ by observing the XOR operations. We propose another DPA on Δ using the addition operation modulo 2 3 2 , and present an experimental result of the DPA. After obtaining the secret key Δ, the underlying problem of SFLASH can be reduced to the C* problem broken by Patarin. From our simulation, about 1408 pairs of messages and signatures are needed to break SFLASH. Consequently, SHA-1 must be carefully implemented in order to resist SCA on SFLASH*." @default.
- W2072667737 created "2016-06-24" @default.
- W2072667737 creator A5023938396 @default.
- W2072667737 date "2005-01-01" @default.
- W2072667737 modified "2023-09-25" @default.
- W2072667737 title "On the Importance of Protecting in SFLASH against Side Channel Attacks" @default.
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- W2072667737 doi "https://doi.org/10.1093/ietfec/e88-a.1.123" @default.
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