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Reproducible families of codes and cryptographic applications. (English) Zbl 1476.94043

Summary: Structured linear block codes such as cyclic, quasi-cyclic and quasi-dyadic codes have gained an increasing role in recent years both in the context of error control and in that of code-based cryptography. Some well known families of structured linear block codes have been separately and intensively studied, without searching for possible bridges between them. In this article, we start from well known examples of this type and generalize them into a wider class of codes that we call \(\mathcal{F} \)-reproducible codes. Some families of \(\mathcal{F} \)-reproducible codes have the property that they can be entirely generated from a small number of signature vectors, and consequently admit matrices that can be described in a very compact way. We denote these codes as compactly reproducible codes and show that they encompass known families of compactly describable codes such as quasi-cyclic and quasi-dyadic codes. We then consider some cryptographic applications of codes of this type and show that their use can be advantageous for hindering some current attacks against cryptosystems relying on structured codes. This suggests that the general framework we introduce may enable future developments of code-based cryptography.

MSC:

94B05 Linear codes (general theory)
94A60 Cryptography
11T71 Algebraic coding theory; cryptography (number-theoretic aspects)

Software:

CAKE; McEliece; BIKE; LEDAkem
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References:

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