Anonymous Identity-Based Broadcast Encryption with Adaptive Security

2013 ◽  
pp. 258-271 ◽  
Author(s):  
Leyou Zhang ◽  
Qing Wu ◽  
Yi Mu
Keyword(s):  
Broadcast Encryption ◽  
Adaptive Security ◽  
Identity Based

Efficient Anonymous Identity-Based Broadcast Encryption without Random Oracles

2014 ◽  
Vol 6 (2) ◽  
pp. 40-51 ◽  
Author(s):  
Xie Li ◽  
Ren Yanli
Keyword(s):  
Prime Order ◽  
Broadcast Encryption ◽  
Broadcast Channel ◽  
Adaptive Security ◽  
Random Oracles ◽  
Constant Size ◽  
Diffie Hellman ◽  
Identity Based ◽  
Bilinear Groups

Broadcast encryption provides a method of secure multi-receiver communications, where a broadcaster can encrypt a message for a set S of users who are listening to a broadcast channel. Most identity-based broadcast encryption (IBBE) schemes are not anonymous, which means the attacker can obtain the identities of all receivers from the ciphertext. In this paper, the authors propose an efficient anonymous IBBE scheme in bilinear groups of prime order, where any attacker cannot get the identities of the receivers from the ciphertext. The scheme has constant size ciphertext and achieves adaptive security based on the asymmetric decisional bilinear Diffie-Hellman Exponent (DBDHE) assumption without random oracles. The proposed scheme improves efficiency and security of anonymous IBBE schemes simultaneously.

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
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