Score:2

Coding gain and minimum determinant in cryptography

cn flag

In coding theory, the notions of coding gain and minimum determinant of a code have been defined as follows: let $\mathcal{X}$ be a (full diversity) code and $X,X^\prime\in\mathcal{X}$.

Then the $\textit{coding gain}$ is $\operatorname{det}\left(\left(X-X^{\prime}\right)\left(X-X^{\prime}\right)^{\dagger}\right)$, and the $\textit{minimum determinant}$ is $min_{X\ne X^\prime\in\mathcal{X}}\operatorname{det}\left(\left(X-X^{\prime}\right)\left(X-X^{\prime}\right)^{\dagger}\right)$.

Do these notions find application in cryptographic terms in code-based cryptography? That is, do properties of the minimum determinant have consequences to a cryptographer building a cryptosystem, or in cryptography in general?

kodlu avatar
sa flag
Write down the explicit definition of coding gain please. And the explicit minimisation for the other. What are you minimising over?
a196884 avatar
cn flag
I've added the definitions.
Score:1
sa flag

I don't believe so. The two concepts are related to fading channels with continuous noise and how fast certain iterative decoding algorithms converge. I cannot think of a relevance to code based cryptography.

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