Improving Key Size and Bit-Security of Modified pqsigRM

The importance of post-quantum cryptography (PQC), which is secure against quantum algorithms, is growing larger. The pqsigRM is a code-based PQC digital signature scheme which was accepted in round 1 of the NIST's PQC standardization process. This scheme was revised as the modified pqsigRM by...

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Veröffentlicht in:International Conference on Information and Communication Technology Convergence (Print) S. 1463 - 1467
Hauptverfasser: Cho, Jinkyu, Lee, Yongwoo, Koo, Zahyun, No, Jong-Seon, Kim, Young-Sik
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: IEEE 19.10.2022
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ISSN:2162-1241
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Abstract The importance of post-quantum cryptography (PQC), which is secure against quantum algorithms, is growing larger. The pqsigRM is a code-based PQC digital signature scheme which was accepted in round 1 of the NIST's PQC standardization process. This scheme was revised as the modified pqsigRM by removing all known vulnerabilities during the standardization process. Its advantages include an efficient decoding process, proven security, and small signature sizes. Small signature sizes are very useful in signature schemes because we should send signatures in every signing process. However, it has a problem with large public key sizes. In this paper, we propose a method to reduce the public key size of modified pqsigRM. We change the public key into a systematic form, improve its parameters, and fine-tune the bit-security for each parameter. Thus, we can reduce to 0.20, 0.40, and 0.23 times smaller public key sizes compared to the modified pqsigRM parameters for 80, 128, and 256 security levels, respectively. Also, we are able to obtain a larger exact bit-security for these parameters.
AbstractList The importance of post-quantum cryptography (PQC), which is secure against quantum algorithms, is growing larger. The pqsigRM is a code-based PQC digital signature scheme which was accepted in round 1 of the NIST's PQC standardization process. This scheme was revised as the modified pqsigRM by removing all known vulnerabilities during the standardization process. Its advantages include an efficient decoding process, proven security, and small signature sizes. Small signature sizes are very useful in signature schemes because we should send signatures in every signing process. However, it has a problem with large public key sizes. In this paper, we propose a method to reduce the public key size of modified pqsigRM. We change the public key into a systematic form, improve its parameters, and fine-tune the bit-security for each parameter. Thus, we can reduce to 0.20, 0.40, and 0.23 times smaller public key sizes compared to the modified pqsigRM parameters for 80, 128, and 256 security levels, respectively. Also, we are able to obtain a larger exact bit-security for these parameters.
Author Kim, Young-Sik
Koo, Zahyun
Lee, Yongwoo
No, Jong-Seon
Cho, Jinkyu
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  givenname: Yongwoo
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  givenname: Zahyun
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  givenname: Jong-Seon
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  givenname: Young-Sik
  surname: Kim
  fullname: Kim, Young-Sik
  email: mypurist@gmail.com
  organization: Chosun University,Department of Information and Communication Engineering,Gwangju,South Korea
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Snippet The importance of post-quantum cryptography (PQC), which is secure against quantum algorithms, is growing larger. The pqsigRM is a code-based PQC digital...
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SubjectTerms code-based cryptosystem
Codes
digital signature scheme
error-correcting codes (ECCs)
Information and communication technology
NIST
Post-quantum cryptography (PQC)
Public key
Quantum algorithm
Reed-Muller (RM) codes
Standardization
Systematics
Title Improving Key Size and Bit-Security of Modified pqsigRM
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