The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
키 재분할성(줄여서 재분할 가능 TPKE)이라는 특수 속성을 갖춘 임계 공개 키 암호화(TPKE) 개념은 Hanaoka 등에 의해 소개되었습니다. (CT-RSA 2012), 프록시 재암호화 체계를 구성하기 위한 구성 요소 중 하나로 사용됩니다. 재분할 가능한 TPKE 방식에서는 비밀 키가 한 번뿐 아니라 여러 번 비밀 키 공유 세트로 분할될 수 있으며, 손상된 비밀 키 공유 수가 제한되지 않는 한 TPKE 방식의 보안이 보장됩니다. 동일한 분할이 임계값보다 작습니다. 본 논문에서는 이전의 (일반적인) TPKE 방식을 확장하여 재분할 가능한 TPKE 방식의 몇 가지 새로운 구성을 보여줍니다. 제안된 모든 방식은 이산 로그(DL) 유형의 가정을 기반으로 합니다. 따라서 우리의 결과는 키 재분할 가능성이 DL 유형 TPKE 방식의 매우 자연스러운 속성임을 시사합니다.
Satsuya OHATA
National Institute of Advanced Industrial Science and Technology (AIST)
Takahiro MATSUDA
National Institute of Advanced Industrial Science and Technology (AIST)
Goichiro HANAOKA
National Institute of Advanced Industrial Science and Technology (AIST)
Kanta MATSUURA
The University of Tokyo
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Satsuya OHATA, Takahiro MATSUDA, Goichiro HANAOKA, Kanta MATSUURA, "More Constructions of Re-Splittable Threshold Public Key Encryption" in IEICE TRANSACTIONS on Fundamentals,
vol. E101-A, no. 9, pp. 1473-1483, September 2018, doi: 10.1587/transfun.E101.A.1473.
Abstract: The concept of threshold public key encryption (TPKE) with the special property called key re-splittability (re-splittable TPKE, for short) was introduced by Hanaoka et al. (CT-RSA 2012), and used as one of the building blocks for constructing their proxy re-encryption scheme. In a re-splittable TPKE scheme, a secret key can be split into a set of secret key shares not only once, but also multiple times, and the security of the TPKE scheme is guaranteed as long as the number of corrupted secret key shares under the same splitting is smaller than the threshold. In this paper, we show several new constructions of a re-splittable TPKE scheme by extending the previous (ordinary) TPKE schemes. All of our proposed schemes are based on discrete logarithm (DL)-type assumptions. Therefore, our results suggest that key re-splittability is a very natural property for DL-type TPKE schemes.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E101.A.1473/_p
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@ARTICLE{e101-a_9_1473,
author={Satsuya OHATA, Takahiro MATSUDA, Goichiro HANAOKA, Kanta MATSUURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={More Constructions of Re-Splittable Threshold Public Key Encryption},
year={2018},
volume={E101-A},
number={9},
pages={1473-1483},
abstract={The concept of threshold public key encryption (TPKE) with the special property called key re-splittability (re-splittable TPKE, for short) was introduced by Hanaoka et al. (CT-RSA 2012), and used as one of the building blocks for constructing their proxy re-encryption scheme. In a re-splittable TPKE scheme, a secret key can be split into a set of secret key shares not only once, but also multiple times, and the security of the TPKE scheme is guaranteed as long as the number of corrupted secret key shares under the same splitting is smaller than the threshold. In this paper, we show several new constructions of a re-splittable TPKE scheme by extending the previous (ordinary) TPKE schemes. All of our proposed schemes are based on discrete logarithm (DL)-type assumptions. Therefore, our results suggest that key re-splittability is a very natural property for DL-type TPKE schemes.},
keywords={},
doi={10.1587/transfun.E101.A.1473},
ISSN={1745-1337},
month={September},}
부
TY - JOUR
TI - More Constructions of Re-Splittable Threshold Public Key Encryption
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1473
EP - 1483
AU - Satsuya OHATA
AU - Takahiro MATSUDA
AU - Goichiro HANAOKA
AU - Kanta MATSUURA
PY - 2018
DO - 10.1587/transfun.E101.A.1473
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E101-A
IS - 9
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - September 2018
AB - The concept of threshold public key encryption (TPKE) with the special property called key re-splittability (re-splittable TPKE, for short) was introduced by Hanaoka et al. (CT-RSA 2012), and used as one of the building blocks for constructing their proxy re-encryption scheme. In a re-splittable TPKE scheme, a secret key can be split into a set of secret key shares not only once, but also multiple times, and the security of the TPKE scheme is guaranteed as long as the number of corrupted secret key shares under the same splitting is smaller than the threshold. In this paper, we show several new constructions of a re-splittable TPKE scheme by extending the previous (ordinary) TPKE schemes. All of our proposed schemes are based on discrete logarithm (DL)-type assumptions. Therefore, our results suggest that key re-splittability is a very natural property for DL-type TPKE schemes.
ER -