.png){kind=icon}
返回
Efficient Privacy-Preserving Ciphertext-Policy Attribute Based-Encryption and Broadcast Encryption
.png){kind=icon}
PRE
AI
DOI：10.1109/TC.2013.200.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Ciphertext Policy Attribute-Based Encryption (CP-ABE) enforces expressive data access policies and each policy consists of a number of attributes. Most existing CP-ABE schemes incur a very large ciphertext size, which increases linearly with respect to the number of attributes in the access policy. Recently, Herranz et al. proposed a construction of CP-ABE with constant ciphertext. However, Herranz et al. do not consider the recipients' anonymity and the access policies are exposed to potential malicious attackers. On the other hand, existing privacy preserving schemes protect the anonymity but require bulky, linearly increasing ciphertext size. In this paper, we proposed a new construction of CP-ABE, named Privacy Preserving Constant CP-ABE (denoted as PP-CP-ABE) that significantly reduces the ciphertext to a constant size with any given number of attributes. Furthermore, PP-CP-ABE leverages a hidden policy construction such that the recipients' privacy is preserved efficiently. As far as we know, PP-CP-ABE is the first construction with such properties. Furthermore, we developed a Privacy Preserving Attribute-Based Broadcast Encryption (PP-AB-BE) scheme. Compared to existing Broadcast Encryption (BE) schemes, PP-AB-BE is more flexible because a broadcasted message can be encrypted by an expressive hidden access policy, either with or without explicit specifying the receivers. Moreover, PP-AB-BE significantly reduces the storage and communication overhead to the order of O(log N), where N is the system size. Also, we proved, using information theoretical approaches, PP-AB-BE attains minimal bound on storage overhead for each user to cover all possible subgroups in the communication system.
Keyword:
Attribute-based encryption (ABE)
privacy-preserving
ciphertext-policy
constant ciphertext length
broadcast encryption
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.8
论文数:
5.3K
被引数:
9.8K
机构
引用论文
分享收藏Amyloid β oligomers constrict human capillaries in Alzheimer’s disease via signaling to pericytes淀粉样 β 低聚物通过向周细胞发出信号来收缩阿尔茨海默氏病中的人类毛细血管.png)
Science
OAAI
ScienceIF0
OAAI分享收藏
查看更多内容