Paper Info
Title
Parallel Implementations of Masking Schemes and the Bounded Moment Leakage Model.
Abstract
In this paper, we provide a necessary clarification of the good security properties that can be obtained from parallel implementations of masking schemes. For this purpose, we first argue that (i) the probing model is not straightforward to interpret, since it more naturally captures the intuitions of serial implementations, and (ii) the noisy leakage model is not always convenient, e.g. when combined with formal methods for the verification of cryptographic implementations. Therefore we introduce a new model, the bounded moment model, that formalizes a weaker notion of security order frequently used in the side-channel literature. Interestingly, we prove that probing security for a serial implementation implies bounded moment security for its parallel counterpart. This result therefore enables an accurate understanding of the links between formal security analyses of masking schemes and experimental security evaluations based on the estimation of statistical moments. Besides its consolidating nature, our work also brings useful technical contributions. First, we describe and analyze refreshing and multiplication algorithms that are well suited for parallel implementations and improve security against multivariate side-channel attacks. Second, we show that simple refreshing algorithms (with linear complexity) that are not secure in the continuous probing model are secure in the continuous bounded moment model. Eventually, we discuss the independent leakage assumption required for masking to deliver its security promises, and its specificities related to the serial or parallel nature of an implementation.
Year
DOI
Venue
2017
10.1007/978-3-319-56620-7_19
ADVANCES IN CRYPTOLOGY - EUROCRYPT 2017, PT I
DocType
Volume
ISSN
Conference
10210
0302-9743
Citations 
PageRank 
References 
14
0.51
38
Authors
6
Name
Order
Citations
PageRank
Gilles Barthe12337152.36
François Dupressoir21749.68
Sebastian Faust3341.53
Benjamin Grégoire481748.93
François-Xavier Standaert53070193.51
Pierre-Yves Strub654029.87