当前位置: X-MOL 学术Peer-to-Peer Netw. Appl. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Attribute-based encryption with outsourced decryption in blockchain
Peer-to-Peer Networking and Applications ( IF 4.2 ) Pub Date : 2020-06-08 , DOI: 10.1007/s12083-020-00918-1
Hui Zheng , Jun Shao , Guiyi Wei

Attribute-based encryption (ABE) is a powerful cryptographic primitive for access control and fine-grained sharing on encrypted data. Due to this functionality, ABE is usually adopted in encrypted cloud storage for flexible data sharing. However, the main drawback of ABE is that the computational cost grows linearly with the complexity of the access policy. One of the promising solutions for the problem is to outsource computation securely. For example, the user can outsource most of the decryption cost to a proxy, while the underlying plaintext remains confidential. Nonetheless, all the existing ABE schemes with outsourced decryption ignore the fairness between the user and the proxy, i.e., the user may refuse to pay even if he/she obtain the valid result. To address this problem, in this paper we propose a new ABE scheme with fair outsourced decryption by using blockchain and sampling technique. In particular, we make use of the smart contract in blockchain to guarantee that the proxy can always get the reward with the valid outsourced decryption result. Furthermore, we apply the sampling technique to enable the miners in blockchain to check the validity of the outsourced decryption result. The detailed analysis conducts that our proposal is secure and fair under some reasonable assumptions, and the experimental results demonstrate that our proposal is efficient. At last, it may be of independent interest that our proposal is a generic construction for pairing-based ABE schemes.

中文翻译:

区块链中基于属性的加密与外包解密

基于属性的加密(ABE)是强大的加密原语,用于访问控制和对加密数据的细粒度共享。由于此功能,加密云存储中通常采用ABE以实现灵活的数据共享。但是,ABE的主要缺点是计算成本随着访问策略的复杂性线性增长。解决该问题的有希望的解决方案之一是安全地将计算外包。例如,用户可以将大部分解密成本外包给代理,而基础纯文本仍是机密的。但是,所有现有的具有外包解密的ABE方案都忽略了用户与代理之间的公平性,即,即使用户获得了有效的结果,用户也可能拒绝付款。为了解决这个问题,在本文中,我们提出了一种采用区块链和采样技术的公平外包解密的ABE新方案。特别是,我们利用区块链中的智能合约来确保代理始终可以获得有效的外包解密结果的奖励。此外,我们采用采样技术使区块链中的矿工能够检查外包解密结果的有效性。详细的分析表明,在合理的假设下,我们的建议是安全,公正的,实验结果表明我们的建议是有效的。最后,我们的建议是基于配对的ABE方案的通用构造,可能对个人有利。我们利用区块链中的智能合约来确保代理始终可以通过有效的外包解密结果获得奖励。此外,我们采用采样技术使区块链中的矿工能够检查外包解密结果的有效性。详细的分析表明,在合理的假设下,我们的建议是安全,公正的,实验结果表明我们的建议是有效的。最后,我们的建议是基于配对的ABE方案的通用构造,可能对个人有利。我们利用区块链中的智能合约来确保代理始终可以通过有效的外包解密结果获得奖励。此外,我们采用采样技术使区块链中的矿工能够检查外包解密结果的有效性。详细的分析表明,在合理的假设下,我们的建议是安全,公正的,实验结果表明我们的建议是有效的。最后,我们的建议是基于配对的ABE方案的通用构造,可能对个人有利。详细的分析表明,在合理的假设下,我们的建议是安全,公正的,实验结果表明我们的建议是有效的。最后,我们的建议是基于配对的ABE方案的通用构造,可能对个人有利。详细的分析表明,在合理的假设下,我们的建议是安全,公正的,实验结果表明我们的建议是有效的。最后,我们的建议是基于配对的ABE方案的通用构造,可能对个人有利。
更新日期:2020-06-08
down
wechat
bug