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Distributed Attribute-Based Encryption

by Sascha Müller, Stefan Katzenbeisser, Claudia Eckert - in International Conference on Information Security and Cryptology (ICISC’08 , 2008
"... allows to encrypt data under an access policy, specified as a logical combination of attributes. Such ciphertexts can be decrypted by anyone with a set of attributes that fits the policy. In this paper, we introduce the concept of Distributed Attribute-Based Encryption (DABE), where an arbitrary num ..."
Abstract - Cited by 16 (2 self) - Add to MetaCart
allows to encrypt data under an access policy, specified as a logical combination of attributes. Such ciphertexts can be decrypted by anyone with a set of attributes that fits the policy. In this paper, we introduce the concept of Distributed Attribute-Based Encryption (DABE), where an arbitrary

Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption

by Allison Lewko, Amit Sahai, Tatsuaki Okamoto, Katsuyuki Takashima, Brent Waters
"... In this paper, we present two fully secure functional encryption schemes. Our first result is a fully secure attribute-based encryption (ABE) scheme. Previous constructions of ABE were only proven to be selectively secure. We achieve full security by adapting the dual system encryption methodology r ..."
Abstract - Cited by 140 (21 self) - Add to MetaCart
In this paper, we present two fully secure functional encryption schemes. Our first result is a fully secure attribute-based encryption (ABE) scheme. Previous constructions of ABE were only proven to be selectively secure. We achieve full security by adapting the dual system encryption methodology

Attribute-Based Broadcast Encryption Scheme Made Efficient

by David Lubicz, Thomas Sirvent
"... Abstract. In this paper, we describe a new broadcast encryption scheme for stateless receivers. The main difference between our scheme and the classical ones derived from the complete subtree paradigm is that the group of privileged users is described by attributes. Actually, some real applications ..."
Abstract - Cited by 9 (0 self) - Add to MetaCart
have been described where the use of a more adaptable access structure brings more efficiency and ease of deployment. On the other side, the decryption algorithm in so far existing attribute-based encryption schemes adapted for broadcast applications is time-consuming for the receiver, since it entails

AttributeBased Encryption Schemes with Constant-Size Ciphertexts

by Nuttapong Attrapadung, Javier Herranz, Fabien Laguillaume, Benoît Libert, Elie De Panafieu, Carla Ràfols - in "Theoretical Computer Science
"... Abstract. Attribute-based encryption (ABE), as introduced by Sahai and Waters, allows for finegrained access control on encrypted data. In its key-policy flavor (the dual ciphertext-policy scenario proceeds the other way around), the primitive enables senders to encrypt messages under a set of attri ..."
Abstract - Cited by 5 (1 self) - Add to MetaCart
policies. This paper proposes the first attribute-based encryption (ABE) schemes allowing for truly expressive access structures and with constant ciphertext size. Our first result is a ciphertext-policy attribute-based encryption (CP-ABE) scheme with O(1)-size ciphertexts for threshold access policies

Enhancing Attribute-Based Encryption with Attribute Hierarchy

by Jin Li, Qian Wang, Cong Wang, Kui Ren , 2009
"... Attribute-based encryption (ABE) has been envisioned as a promising cryptographic primitive for realizing secure and flexible access control. However, ABE is being criticized for its high scheme overhead as extensive pairing operations are usually required. In this paper, we focus on improving the e ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
Attribute-based encryption (ABE) has been envisioned as a promising cryptographic primitive for realizing secure and flexible access control. However, ABE is being criticized for its high scheme overhead as extensive pairing operations are usually required. In this paper, we focus on improving

Fully Secure Unbounded Inner-Product and Attribute-Based Encryption

by Tatsuaki Okamoto, Katsuyuki Takashima , 2012
"... In this paper, we present the first inner-product encryption (IPE) schemes that are unbounded in the sense that the public parameters do not impose additional limitations on the predicates and attributes used for encryption and decryption keys. All previous IPE schemes were bounded, or have a bound ..."
Abstract - Cited by 10 (0 self) - Add to MetaCart
-product relation is generalized, where the two vectors of inner-product can be different sizes and it provides a great improvement of efficiency in many applications. We also present the first fully secure unbounded attribute-based encryption (ABE) schemes, and the security is proven under the DLIN assumption

Attribute-Based Encryption with Key Cloning Protection

by M. J. Hinek, S. Jiang, R. Safavi-naini, S. F. Shah , 2008
"... Abstract. In this work, we consider the problem of key cloning in attribute-based encryption schemes. We introduce a new type of attribute-based encryption scheme, called token-based attributebased encryption, that provides strong deterrence for key cloning, in the sense that delegation of keys reve ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
Abstract. In this work, we consider the problem of key cloning in attribute-based encryption schemes. We introduce a new type of attribute-based encryption scheme, called token-based attributebased encryption, that provides strong deterrence for key cloning, in the sense that delegation of keys

Attribute-based functional encryption on lattices (Extended Abstract)

by Xavier Boyen , 2012
"... We introduce a broad lattice manipulation technique for expressive cryptography, and use it to realize functional encryption for access structures from post-quantum hardness assumptions. Speci cally, we build an e cient key-policy attribute-based encryption scheme, and prove its security in the sele ..."
Abstract - Cited by 14 (0 self) - Add to MetaCart
We introduce a broad lattice manipulation technique for expressive cryptography, and use it to realize functional encryption for access structures from post-quantum hardness assumptions. Speci cally, we build an e cient key-policy attribute-based encryption scheme, and prove its security

Enforcing Access Control in Virtual Organizations Using Hierarchical Attribute-Based Encryption

by Muhammad Asim, Tanya Ignatenko, Milan Petkovic, Daniel Trivellato
"... Virtual organizations are dynamic, inter-organizational collaborations that involve systems and services belonging to different security domains. Several solutions have been proposed to guarantee the enforce-ment of the access control policies protecting the information exchanged in a distributed sy ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
system, but none of them addresses the dynamicity characterizing virtual organizations. In this paper we propose a dynamic hiearchical attribute-based encryption (D-HABE) scheme that allows the institutions in a virtual organiza-tion to encrypt information according to an attribute-based policy in such a

Attribute-Based Encryption with Fast Decryption

by Susan Hohenberger, Brent Waters , 2013
"... Attribute-based encryption (ABE) is a vision of public key encryption that allows users to encrypt and decrypt messages based on user attributes. This functionality comes at a cost. In a typical implementation, the size of the ciphertext is proportional to the number of attributes associated with it ..."
Abstract - Cited by 14 (0 self) - Add to MetaCart
Attribute-based encryption (ABE) is a vision of public key encryption that allows users to encrypt and decrypt messages based on user attributes. This functionality comes at a cost. In a typical implementation, the size of the ciphertext is proportional to the number of attributes associated
Results 1 - 10 of 458,685