By Dongdai Lin, Shouhuai Xu, Moti Yung
This ebook constitutes the completely refereed post-conference court cases of the ninth overseas convention on info safety and Cryptology, Inscrypt 2013, held in Guangzhou, China, in November 2013.
The 21 revised complete papers offered including four brief papers have been conscientiously reviewed and chosen from ninety three submissions. The papers disguise the subjects of Boolean functionality and block cipher, series and circulate cipher, functions: structures and concept, computational quantity idea, public key cryptography, has functionality, side-channel and leakage, and alertness and process security.
Read or Download Information Security and Cryptology: 9th International Conference, Inscrypt 2013, Guangzhou, China, November 27-30, 2013, Revised Selected Papers PDF
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Extra info for Information Security and Cryptology: 9th International Conference, Inscrypt 2013, Guangzhou, China, November 27-30, 2013, Revised Selected Papers
LNCS, vol. 2045, pp. 406–419. Springer, Heidelberg (2001) 30. : Constructions of quadratic bent functions in polynomial forms. IEEE Trans. Inf. cn Abstract. Block ciphers use Substitution boxes (S-boxes) to create confusion into the cryptosystems. For resisting the known attacks on these cryptosystems, the following criteria for functions are mandatory: low diﬀerential uniformity, high nonlinearity and not low algebraic degree. Bijectivity is also necessary if the cipher is a Substitution-Permutation Network, and balancedness makes a Feistel cipher lighter.
With the objective function and constraints presented as above, the problem of calculating a lower bound of the number of active S-boxes is modelled as an MILP instance which can be solved by the CPLEX  optimizer.
Highly automatic methods employing Mixed Integer Liner Programming (MILP) were presented in [22,26] to determine the minimum number of active S-boxes for SPN structures and Feistel structures with SPN round functions. In this paper, we are mostly interested in the methods based on MILP since they are the most automatic methods and require less programming eﬀort compared with other methods. Using this method, what an analyst need to do is just to write a program to generate the MILP instance with suitable objective function and constraints imposed by the diﬀerential propagation of the cipher.