Hierarchical Identity-Based Broadcast Encryption

2014 ◽  
pp. 242-257 ◽  
Author(s):  
Weiran Liu ◽  
Jianwei Liu ◽  
Qianhong Wu ◽  
Bo Qin
Keyword(s):  
Broadcast Encryption ◽  
Identity Based

scholarly journals Adaptive Secure Cross-Cloud Data Collaboration with Identity-Based Cryptography and Conditional Proxy Re-Encryption

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Qinlong Huang ◽  
Yue He ◽  
Wei Yue ◽  
Yixian Yang
Keyword(s):  
Service Providers ◽  
Cloud Service ◽  
Security And Privacy ◽  
Broadcast Encryption ◽  
Cloud Data ◽  
Identity Based ◽  
Identity Based Cryptography ◽  
And Performance ◽  
Cryptographic Techniques ◽  
Data Collaboration

Data collaboration in cloud computing is more and more popular nowadays, and proxy deployment schemes are employed to realize cross-cloud data collaboration. However, data security and privacy are the most serious issues that would raise great concerns from users when they adopt cloud systems to handle data collaboration. Different cryptographic techniques are deployed in different cloud service providers, which makes cross-cloud data collaboration to be a deeper challenge. In this paper, we propose an adaptive secure cross-cloud data collaboration scheme with identity-based cryptography (IBC) and proxy re-encryption (PRE) techniques. We first present a secure cross-cloud data collaboration framework, which protects data confidentiality with IBC technique and transfers the collaborated data in an encrypted form by deploying a proxy close to the clouds. We then provide an adaptive conditional PRE protocol with the designed full identity-based broadcast conditional PRE algorithm, which can achieve flexible and conditional data re-encryption among ciphertexts encrypted in identity-based encryption manner and ciphertexts encrypted in identity-based broadcast encryption manner. The extensive analysis and experimental evaluations demonstrate the well security and performance of our scheme, which meets the secure data collaboration requirements in cross-cloud scenarios.

Accountable authority identity-based broadcast encryption with constant-size private keys and ciphertexts

2020 ◽  
Vol 809 ◽  
pp. 73-87 ◽  
Author(s):  
Zhen Zhao ◽  
Fuchun Guo ◽  
Jianchang Lai ◽  
Willy Susilo ◽  
Baocang Wang ◽  
...  
Keyword(s):  
Broadcast Encryption ◽  
Constant Size ◽  
Identity Based

Recipient Revocable Identity-Based Broadcast Encryption

2016 ◽  
Author(s):  
Willy Susilo ◽  
Rongmao Chen ◽  
Fuchun Guo ◽  
Guomin Yang ◽  
Yi Mu ◽  
...  
Keyword(s):  
Broadcast Encryption ◽  
Identity Based

Fully Secure Codes Based Tracing and Revoking Scheme with Constant Ciphertext

2014 ◽  
Vol 543-547 ◽  
pp. 3300-3307 ◽  
Author(s):  
Xing Wen Zhao ◽  
Gao Fei Zhao ◽  
Hui Li
Keyword(s):  
Random Oracle ◽  
Broadcast Encryption ◽  
Traitor Tracing ◽  
Encryption Scheme ◽  
User Revocation ◽  
New Construction ◽  
Identity Based ◽  
Traitor Tracing Schemes ◽  
Adaptive Adversary ◽  
Adversary Model

In broadcast encryption system certain users may leak their decryption keys to build pirate decoders, so traitor tracing is quite necessary. There exist many codes based traitor tracing schemes. As pointed out by Billet and Phan in ICITS 2008, these schemes lack revocation ability. The ability of revocation can disable identified malicious users and users who fail to fulfill the payments, so that the broadcast encryption system can be more practical. Recently, Zhao and Li presented a construction of codes based tracing and revoking scheme which achieves user revocation as well as traitor tracing. However, their scheme is only secure against chosen plaintext attacks under selective-adversary model with random oracle. In this paper, we obtain a new construction of codes based tracing and revoking scheme which is proved secure against chosen ciphertext attacks under adaptive-adversary model without random oracle. Our idea is to insert codeword into Boneh and Hamburgs identity based broadcast encryption scheme to retain the ability of user revocation and use Boneh and Naors method to trace traitors. Our fully secure scheme is roughly as efficient as Zhao and Lis scheme while the security is enhanced.

Identity-based broadcast encryption with shorter transmissions

2008 ◽  
Vol 13 (6) ◽  
pp. 641-645
Author(s):  
Le-you Zhang ◽  
Yu-pu Hu ◽  
Ning-bo Mu
Keyword(s):  
Broadcast Encryption ◽  
Identity Based
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