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- W2953439325 abstract "Recently, a new rank metric code, namely LRPC-Kronecker Product codes was proposed in APKC 2018 Workshop, and adapted into a construction of a new cryptosystem, namely the LRPC-Kronecker cryptosystem. The LRPC-Kronecker cryptosystem has compact key size, with their parameters achieve 256-bit security with key size (9,768 bits) smaller than the RSA’s key size (15,360 bits). It was also shown that the LRPC-Kronecker cryptosystem is CCA2-secured via the Kobara-Imai conversion. In this paper, we point out some errors in the original LRPC-Kronecker cryptosystem and suggest a reparation for the errors. We show that the LRPC-Kronecker cryptosystem in fact is equivalent to the LRPC cryptosystem. With this equivalence shown, we suggest alternative encryption and decryption, namely AKron for the LRPC-Kronecker cryptosystem. Furthermore, we show that there exists design weakness in the LRPC-Kronecker cryptosystem. We exploit this weakness and successfully cryptanalyze all the suggested parameters for (k_1 = n_1). We are able to recover secret key for all the proposed parameters within the claimed security level." @default.
- W2953439325 created "2019-07-12" @default.
- W2953439325 creator A5019993874 @default.
- W2953439325 creator A5058176227 @default.
- W2953439325 date "2019-01-01" @default.
- W2953439325 modified "2023-10-06" @default.
- W2953439325 title "Cryptanalysis on CCA2-Secured LRPC-Kronecker Cryptosystem" @default.
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- W2953439325 doi "https://doi.org/10.1007/978-3-030-21548-4_12" @default.
- W2953439325 hasPublicationYear "2019" @default.
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