Fully homomorphic encryption (FHE) is a “holy grail” of cryptography. However, it is not yet adopted in practice because no known scheme is efficient. In this paper, we mainly focus on how to reduce the public key sizes in FHE. Based on Dijk et al.’s FHE scheme (DGHV) and Gentry’s fully homomorhpic technology, we propose two schemes with shorter public keys by encrypting with a combination of the public key elements to replace a linear form in DGHV scheme and a quadratic form in Coron et al.’s scheme. Compared with DGHV scheme and Coron et al.’s scheme, our schemes can greatly reduce the public key sizes, which make our schemes more efficient. Furthermore, we prove the security of our schemes based on difficulties of the approximate greatest common divisor (AGCD) problem and the sparse subset sum problem.
목차
Abstract 1. Introduction 1.1. Related Work 1.2. Our Contributions 1.3. Organization 2. Preliminaries 3. Somewhat Homomorphic Encryption Scheme 3.1. SWHE Scheme in the DGHV Scheme over the Integers 3.2. Our SWHE Schemes over the Integers 4. Making the Scheme Fully Homomorphic 4.1. Compressing the Decryption Circuit 4.2. Bootstrapping 5. Conclusion Acknowledgements References
키워드
Fully Homomorphic EncryptionShorter Public Key SizeAGCD problem
저자
Can Xiang [ School of Mathematics and Information Science, Guangzhou University, guangzhou 510006, P.R.China, Key Laboratory of Mathematics and Interdisciplinary Sciences of Guangdong Higher Education Institutes, Guangzhou University, Guangzhou, P.R. China ]
Chun-ming Tang [ School of Mathematics and Information Science, Guangzhou University, guangzhou 510006, P.R.China, Key Laboratory of Mathematics and Interdisciplinary Sciences of Guangdong Higher Education Institutes, Guangzhou University, Guangzhou, P.R. China, State Key Laboratory of Information Security, Beijing 100093, P.R.China ]
Corresponding author
보안공학연구지원센터(IJSIA) [Science & Engineering Research Support Center, Republic of Korea(IJSIA)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Security and Its Applications
간기
격월간
pISSN
1738-9976
수록기간
2008~2016
등재여부
SCOPUS
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Security and Its Applications Vol.8 No.6