基于属性的加密
加密
计算机科学
代理重新加密
密文
白盒子
计算机安全
功能加密
问责
理论计算机科学
公钥密码术
软件工程
政治学
法学
作者
Dominik Ziegler,Alexander Marsalek,Gerald Palfinger
标识
DOI:10.1109/trustcom53373.2021.00059
摘要
We address three practical problems of Attribute-Based Encryption (ABE) in this paper: performance, accountabil-ity and privacy. To do so, we present a novel Ciphertext-Policy Attribute-Based Encryption (CP-ABE) approach, which combines white-box accountability, hidden policies and outsourced decryption. In contrast to existing schemes, the proposed construction is not only more flexible, but also efficient enough to be used in more resource-constrained environments. This is because our construction is designed around efficient Type III bilinear maps and relies on a dedicated proxy to perform computationally ex-pensive operations. Furthermore, we provide an implementation of the proposed design. The conducted evaluation demonstrates the practicality of the approach under realistic assumptions.
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