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RISS 인기검색어
- 검색키워드
- 저자 : Rifki Sadikin (검색결과 6 건)
- 무료
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- 유료
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Ciphertext Policy-Attribute Based Encryption with Non Monotonic Access Structures
Rifki Sadikin(리프키 사디킨),SangJae Moon(문상재),YoungHo Park(박영호) 대한전자공학회 2013 전자공학회논문지 Vol.50 No.9
CP-ABE 방식은 신뢰된 서버 없이 접근 제어 메카니즘을 구현할 수 있다. 본 논문에서는 권한을 부여받은 사용자가 민감한 데이터에 접근할 수 있도록 CP-ABE 방식으로 속성기반 접근 제어 메카니즘을 제안한다. CP-ABE 개념은 암호문에서 접근 제어 방법을 포함하는 것이다. 만약 사용자가 암호문의 접근 구조를 통해 속성을 가진다면 암호문은 복호될 수 있다. 본 논문에서는 제안한 CP-ABE 방식이 비단조 접근 구조로 표현됨을 증명하고 다른 CP-ABE 방식들과 성능 비교한다. A ciphertext policy-attribute based encryption(CP-ABE) scheme can be used to realize access control mechanism without a trusted server. We propose an attribute-based access control mechanism by incorporating a CP-ABE scheme to ensure only authorized users can access the sensitive data. The idea of CP-ABE is to include access control policy in the ciphertexts, in which they can only be decrypted if a user possesses attributes that pass through the ciphertext"s access structure. In this paper, we prove a secure CP-ABE scheme where the policy can be expressed in non-monotonic access structures. We further compare the performance of our scheme with the existing CP-ABE schemes.
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Universal Composability Notion for Functional Encryption Schemes
Sadikin, Rifki,Park, YoungHo,Park, KilHoum,Moon, SangJae Korea Society of Industrial Information Systems 2013 한국산업정보학회논문지 Vol.18 No.3
We have developed an ideal functionality for security requirement of functional encryption schemes. The functionality is needed when we want to show the security of a functional encryption scheme in universal composable (UC) framework. A functionality $F_{fe}$ was developed to represent ideal respond of a functional encryption scheme against any polynomial time active attacker. We show that UC security notion of functional encryption scheme $F_{fe}$ is as strong as fully secure functional encryption in an indistinguishable game with chosen cipher text attack. The proof used a method that showing for any environment algorithm, it can not distinguish ideal world where the attacker play with ideal functionality $F_{fe}$ and real world where the attacker play a fully secure functional encryption scheme.
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Secure Attribute-Based Access Control with a Ciphertext-Policy Attribute-Based Encryption Scheme
Sadikin, Rifki,Park, Young Ho,Park, Kil Houm Korea Society of Industrial Information Systems 2014 한국산업정보학회논문지 Vol.19 No.1
An access control system is needed to ensure only authorized users can access a sensitive resource. We propose a secure access control based on a fully secure and fine grained ciphertext-policy attribute-based encryption scheme. The access control for a sensitive resource is ensured by encrypting it with encryption algorithm from the CP-ABE scheme parameterized by an access control policy. Furthermore, the proposed access control supports non-monotone type access control policy. The ciphertext only can be recovered by users whose attributes satisfy the access control policy. We also implement and measure the performance of our proposed access control. The results of experiments show that our proposed secure access control is feasible.
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Universal Composability Notion for Functional Encryption Schemes
Rifki Sadikin,YoungHo Park,KilHoum Park,SangJae Moon 한국산업정보학회 2013 한국산업정보학회논문지 Vol.18 No.3
We have developed an ideal functionality for security requirement of functional encryption schemes. The functionality is needed when we want to show the security of a functional encryption scheme in universal composable (UC) framework. A functionality Ffewas developed to represent ideal respond of a functional encryption scheme against any polynomial time active attacker. We show that UC security notion of functional encryption scheme Ffe is as strong as fully secure functional encryption in an indistinguishable game with chosen cipher text attack. The proof used a method that showing for any environment algorithm, it can not distinguish ideal world where the attacker play with ideal functionality Ffe and real world where the attacker play a fully secure functional encryption scheme.
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Secure Attribute - Based Access Control with a Ciphertext-Policy Attribute - Based Encryption Scheme
Rifki Sadikin,Young Ho Park,Kil Houm Park 한국산업정보학회 2014 한국산업정보학회논문지 Vol.19 No.1
An access control system is needed to ensure only authorized users can access a sensitive resource. We propose a secure access control based on a fully secure and fine grained ciphertext-policy attribute-based encryption scheme. The access control for a sensitive resource is ensured by encrypting it with encryption algorithm from the CP-ABE scheme parameterized by an access control policy. Furthermore, the proposed access control supports non-monotone type access control policy. The ciphertext only can be recovered by users whose attributes satisfy the access control policy. We also implement and measure the performance of our proposed access control. The results of experiments show that our proposed secure access control is feasible.
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Bilinear Group에서 속성 은닉을 가지는 안전한 내적 암호화 방식
리프키 사디킨(Rifki Sadikin),박영호(YoungHo Park) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.1
내적 암호화 방식은 비밀키와 암호문 사이에 파인 그레인 관계를 제공하는 암호학적 프리미티브이다. 본 논문은 완전한 속성 은닉 보호를 수행하는 새로운 IPE 방식을 제안한다. 제안한 IPE 방식은 합성 위수의 bilinear groups에 기반한다. 본 논문에서는 이중 암호화 시스템 체계를 사용하여 제안한 IPE의 완전한 속성 은닉 보호를 증명한다. 성능 분석에서 기존의 IPE 방식들과 제안한 IPE 방식의 연산량과 메모리 할당량을 비교한다. Inner product encryption (IPE) scheme is a cryptographic primitive that provides fine grained relations between secret keys and ciphertexts. This paper proposes a new IPE scheme which achieves fully attribute hiding security. Our IPE scheme is based on bilinear groups of a composite order. We prove the fully attribute hiding security of our IPE by using dual encryption system framework. In performance analysis, we compare the computation cost and memory requirement of our proposed IPE to other existing IPE schemes.
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