McEliece密码系统中基于原型图的准循环MDPC码
Protograph-based Quasi-Cyclic MDPC Codes for McEliece Cryptosystems
摘要:
本文在类McEliece-like密码体制的背景下,引入并分析了基于原模图的准循环中密度奇偶校验(MDPC)码的集合。建议的合奏显着提高了纠错能力的常规MDPC代码合奏,目前被认为是后量子密码系统,而不增加的公钥大小。建议的合奏分析在渐近设置通过密度演化,无论是在和产品算法和低复杂度(错误和擦除)的消息传递算法。的渐近分析补充有限块长度的Monte Carlo模拟。增强的纠错能力显着提高了该方案的鲁棒性相对于(已知的)解码攻击。
英文摘要:
In this paper, ensembles of quasi-cyclic moderate-density parity-check (MDPC) codes based on protographs are introduced and analyzed in the context of a McEliece-like cryptosystem. The proposed ensembles significantly improve the error correction capability of the regular MDPC code ensembles that are currently considered for post-quantum cryptosystems without increasing the public key size. The proposed ensembles are analyzed in the asymptotic setting via density evolution, both under the sum-product algorithm and a low-complexity (error-and-erasure) message passing algorithm. The asymptotic analysis is complemented at finite block lengths by Monte Carlo simulations. The enhanced error correction capability remarkably improves the scheme robustness with respect to (known) decoding attacks.
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