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2015 | OriginalPaper | Buchkapitel

Consolidating Masking Schemes

verfasst von : Oscar Reparaz, Begül Bilgin, Svetla Nikova, Benedikt Gierlichs, Ingrid Verbauwhede

Erschienen in: Advances in Cryptology -- CRYPTO 2015

Verlag: Springer Berlin Heidelberg

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Abstract

In this paper we investigate relations between several masking schemes. We show that the Ishai–Sahai–Wagner private circuits construction is closely related to Threshold Implementations and the Trichina gate. The implications of this observation are manifold. We point out a higher-order weakness in higher-order Threshold Implementations, suggest a mitigation and provide new sharings that use a lower number of input shares.

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Vorheriges Kapitel Algebraic Decomposition for Probing Security

One of the many ways of synchronization is storing elements in registers which we inherit throughout this paper without loss of generalization.

We stress that ISW with \(s=2\) is neither strictly defined nor proven secure in the ISW simulation model. We are extending the algorithm in Fig. 2 in a straight forward way to any s.

It is possible to add other terms to \(\mathcal {N}\) (as long as they are inserted an even number of times), such as virtual variable pairs [6], in order to increase the flexibility for generating a uniform sharing.

The goal is to show leakage in this construction. To simplify and keep the essentials, we do not explicitly inject the key in this mini-cipher construction, but assume that the initial state is secret (sensitive).

This result had been previously reported in [23] and experimentally confirmed in [26].

http://www.reparaz.net/oscar/crypto2015/.

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Titel: Consolidating Masking Schemes
verfasst von: Oscar Reparaz
Begül Bilgin
Svetla Nikova
Benedikt Gierlichs
Ingrid Verbauwhede
Verlag: Springer Berlin Heidelberg
Buch: Advances in Cryptology -- CRYPTO 2015
Print ISBN: 978-3-662-47988-9

Electronic ISBN: 978-3-662-47989-6

Copyright-Jahr: 2015
DOI: https://doi.org/10.1007/978-3-662-47989-6_37

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