By Emmanuel Prouff

This booklet constitutes the completely refereed post-conference court cases of the fifth foreign Workshop, COSADE 2014, held in Paris, France, in April 2014. The 20 revised complete papers awarded including invited talks have been conscientiously chosen from fifty one submissions and acquire really latest ends up in cryptographic engineering, from thoughts to artifacts, from software program to undefined, from assault to countermeasure.

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Additional info for Constructive Side-Channel Analysis and Secure Design: 5th International Workshop, COSADE 2014, Paris, France, April 13-15, 2014. Revised Selected Papers

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Differential properties of power functions. In: ISIT, pp. 2478–2482. IEEE (2010) 3. : On highly nonlinear S-Boxes and their inability to thwart DPA attacks. , Venkatesan, R. ) INDOCRYPT 2005. LNCS, vol. 3797, pp. 49–62. Springer, Heidelberg (2005) 4. : Boolean models and methods in mathematics, computer science, and engineering. , Hammer, P. ) Vectorial Boolean Functions for Cryptography, pp. 398–469. Cambridge University Press, Cambridge (2010). html) 5. : Links between differential and linear cryptanalysis.

Firstly, how to represent the cipher and secondly, which sort of solver to use. In our study here we incorporated techniques that were published in previous work to ensure we have a reasonably efficient representation. e. CryptoMiniSat 2, and did not develop our own tools). Whilst most side-channel attacks follow a divide-and-conquer strategy, when performing an algebraic attack, the adversary aims for full key recovery in one go and is able to make use of all available side-channel information at once.

5, we present our approach to thwart DPA on XTEA using various algorithms and evaluate their performance. In Sect. 6, other applications and extensions of our algorithms are proposed. Finally, we conclude in Sect. 7. 2 Notation This section introduces some notation. 3], given three integers in their binary notation, namely x = (. . x2 x1 x0 )2 , y = (. . y2 y1 y0 )2 , and z = (. . z2 z1 z0 )2 , we write 44 M. Karroumi et al. x & y = z ⇐⇒ zi = xi ∧ yi , for all i x ⊕ y = z ⇐⇒ zi = xi ⊕ yi , for all i 0; 0; where ∧ and ⊕ respectively denote the Boolean operators and and xor (exclusive or).

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