Achieving Leakage Resilience through Dual System Encryption
Achieving Leakage Resilience through Dual System Encryption
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DOI：
10.1007/978-3-642-19571-6_6
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Allison Bishop;Yannis Rouselakis;Brent Waters
中科院分区：
文献类型：
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作者：
Allison Bishop;Yannis Rouselakis;Brent Waters
在这项工作中，我们表明，具有先进功能的密码系统的强大的泄漏弹性可以很自然地获得双系统加密的方法，最近推出的沃茨。我们具体地证明了这一点，提供完全安全的IBE，HIBE和ABE系统，这些系统对每个用户的许多秘密密钥以及许多主密钥的有界泄漏具有弹性。如果我们假设密钥定期更新，并且在更新过程中不允许（或对数）泄漏，则这可以实现为对持续泄漏的弹性。我们的系统是通过对以前的双系统加密结构进行简单的修改而获得的：从本质上讲，这提供了一个通用的工具，使双系统加密方案具有泄漏弹性。
In this work, we show that strong leakage resilience for cryptosystems with advanced functionalities can be obtained quite naturally within the methodology of dual system encryption, recently introduced by Waters. We demonstrate this concretely by providing fully secure IBE, HIBE, and ABE systems which are resilient to bounded leakage from each of many secret keys per user, as well as many master keys. This can be realized as resilience against continual leakage if we assume keys are periodically updated and no (or logarithmic) leakage is allowed during the update process. Our systems are obtained by applying a simple modification to previous dual system encryption constructions: essentially this provides a generic tool for making dual system encryption schemes leakage-resilient.