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2022•2022 IEEE International Multi-Conference on Engineering, Computer and Information Sciences (SIBIRCON)Requires access

On the improvement of McEliece cryptosystem based on LDPC codes

Artemiy Rudzyanskiy, Fedor I. Ivanov

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Abstract

In this paper an improvement of the McEliece cryptosystem based on QC-LDPC codes is considered. The key idea of the improvement is to use soft-decision decoding algorithm of LDPC codes in decryption step. This allows to reduce a public- key size in comparison with the McEliece cryptosystem based on QC-LDPC codes decoded by hard-decision bit-flipping decoder. In addition, the analysis of the dependence between key size and security in bits for the proposed cryptosystem was conducted.

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What this paper is about

In this paper an improvement of the McEliece cryptosystem based on QC-LDPC codes is considered. The key idea of the improvement is to use soft-decision decoding algorithm of LDPC codes in decryption step. This allows to reduce a public- key size in comparison with the McEliece cryptosystem based on QC-LDPC codes decoded by hard-decision bit-flipping decoder. In addition, the analysis of the dependence between key size and security in bits for the proposed cryptosystem was conducted.

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Available abstract

In this paper an improvement of the McEliece cryptosystem based on QC-LDPC codes is considered. The key idea of the improvement is to use soft-decision decoding algorithm of LDPC codes in decryption step. This allows to reduce a public- key size in comparison with the McEliece cryptosystem based on QC-LDPC codes decoded by hard-decision bit-flipping decoder. In addition, the analysis of the dependence between key size and security in bits for the proposed cryptosystem was conducted.

Key concepts: McEliece cryptosystem, Cryptosystem, Low-density parity-check code, Decoding methods, Computer science, Key size, Hybrid cryptosystem, Key (lock)

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