Key-Policy Attribute-Based Encryption for General Boolean Circuits from Secret Sharing and Multi-linear Maps

2016 ◽  
pp. 112-133 ◽  
Author(s):  
Constantin Cătălin Drăgan ◽  
Ferucio Laurenţiu Ţiplea
Keyword(s):  
Secret Sharing ◽  
Boolean Circuits ◽  
Attribute Based Encryption ◽  
Linear Maps ◽  
Key Policy

scholarly journals Space-Efficient Key-Policy Attribute-Based Encryption from Lattices and Two-Dimensional Attributes

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yuan Liu ◽  
Licheng Wang ◽  
Xiaoying Shen ◽  
Lixiang Li ◽  
Dezhi An
Keyword(s):  
Secret Sharing ◽  
Secret Key ◽  
Security Issue ◽  
Access Policy ◽  
Attribute Based Encryption ◽  
The Standard Model ◽  
Security Problem ◽  
Key Policy ◽  
Space Cost ◽  
Dynamic Updating

Linear secret-sharing scheme (LSSS) is a useful tool for supporting flexible access policy in building attribute-based encryption (ABE) schemes. But in lattice-based ABE constructions, there is a subtle security problem in the sense that careless usage of LSSS-based secret sharing over vectors would lead to the leakage of the master secret key. In this paper, we propose a new method that employs LSSS to build lattice-based key-policy attribute-based encryption (KP-ABE) that resolves this security issue. More specifically, no adversary can reconstruct the master secret key since we introduce a new trapdoor generation algorithm to generate a strong trapdoor (instead of a lattice basis), that is, the master secret key, and remove the dependency of the master secret key on the total number of system attributes. Meanwhile, with the purpose of reducing the storage cost and support dynamic updating on attributes, we extended the traditional 1-dimensional attribute structure to 2-dimensional one. This makes our construction remarkably efficient in space cost, with acceptable time cost. Finally, our scheme is proved to be secure in the standard model.

Key-policy attribute-based encryption against continual auxiliary input leakage

2019 ◽  
Vol 470 ◽  
pp. 175-188 ◽  
Author(s):  
Jiguo Li ◽  
Qihong Yu ◽  
Yichen Zhang ◽  
Jian Shen
Keyword(s):  
Attribute Based Encryption ◽  
Key Policy ◽  
Auxiliary Input

Unbounded Key-Policy Attribute-Based Encryption With Black-Box Traceability

2020 ◽  
Author(s):  
yunxiu ye ◽  
Zhenfu Cao ◽  
Jiachen Shen
Keyword(s):  
Control Method ◽  
Black Box ◽  
Broadcast Encryption ◽  
Constant Number ◽  
Malicious User ◽  
Attribute Based Encryption ◽  
Key Policy ◽  
Actual Operation ◽  
Attribute Based Access Control ◽  
And Performance

Abstract Attribute-based encryption received widespread attention as soon as it proposes. However, due to its specific characteristics, the attribute-based access control method is not flexible enough in actual operation. In addition, since access authorities are determined according to users' attributes, users sharing the same attributes are difficult to distinguish. Once a malicious user makes illicit gains by their decryption authorities, it is difficult to trace specific users. This paper follows the practical demand to propose a more flexible key-policy attribute-based encryption scheme with black-box traceability. The scheme has a constant number of constant parameters which can be utilized to construct attribute-related parameters flexibly, and the method of traitor tracing in broadcast encryption is introduced to achieve effective malicious user tracing. In addition, the security and feasibility can be proved by the security proofs and performance evaluation in this paper.

Privacy-Preserving Decentralized Key-Policy Attribute-Based Signcryption in Cloud Computing Environments

2013 ◽  
Vol 475-476 ◽  
pp. 1144-1149
Author(s):  
Xian Yong Meng ◽  
Zhong Chen ◽  
Xiang Yu Meng
Keyword(s):  
Cloud Computing ◽  
Access Control ◽  
Secret Sharing ◽  
Public Key ◽  
Control Scheme ◽  
Public Keys ◽  
Key Policy ◽  
Computing Environments ◽  
Attribute Based Access Control ◽  
Signcryption Scheme

In this paper, a novel decentralized key-policy attribute-based signcryption (ABS) scheme is proposed, where each authority can generate secret-public key pair for the user independently without any cooperation and a centralized authority. In the proposed scheme, each authority can join or leave the system randomly without reinitializing the system,and issue secret-public keys to user respectively. Therefore, it is clear that the multi-authority attribute-based access control scheme can reduce the communication cost and the collaborative computing cost. Additionally, the attribute-based signcryption scheme is efficient in terms of both the identification authentication and the confidential communication, and can realize security secret sharing in cloud computing environments.

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