Fine-Grained Two-Factor Protection Mechanism for Data Sharing in Cloud Storage

Fine-Grained Two-Factor Protection Mechanism for Data Sharing in Cloud Storage
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云存储数据共享的细粒度双因素保护机制

DOI:
10.1109/tifs.2017.2746000
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发表时间:
2018
影响因子:
6.8
通讯作者:
Ling Yun
Ling Yun
中科院分区:
计算机科学1区
文献类型:
--
作者:
Zuo Cong;Shao Jun;Liu Joseph K.;Wei Guiyi;Ling Yun

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云存储中的数据共享由于能够为用户提供高效、有效的存储服务而受到信息通信技术领域的高度重视。为了保护共享的敏感数据的机密性,通常采用加密技术。然而,在数据共享的云存储中,数据保护仍然面临着重大挑战。其中,如何保护和撤销密码密钥是最根本的挑战。为了解决这个问题,我们提出了一种新的云存储数据保护机制,它具有以下属性。首先,加密密钥受到两个因素的保护。只有当两个因素中的一个起作用时,加密密钥的保密性才得以保持。其次,通过集成代理重加密和密钥分离技术,可以有效地撤销加密密钥。最后,采用基于属性的加密技术对数据进行细粒度保护。此外,安全性分析和性能评估分别表明我们的方案是安全的和高效的。
Data sharing in cloud storage is receiving substantial attention in information communications technology because it can provide users with efficient and effective storage services. To protect the confidentiality of the shared sensitive data, cryptographic techniques are usually applied. However, the data protection is still posing significant challenges in cloud storage for data sharing. Among them, how to protect and revoke the cryptographic key is the fundamental challenge. To tackle this, we propose a new data protection mechanism for cloud storage, which holds the following properties. First, the cryptographic key is protected by the two factors. Only if one of the two factors works, the secrecy of the cryptographic key is held. Second, the cryptographic key can be revoked efficiently by integrating the proxy re-encryption and key separation techniques. Finally, the data is protected in a fine-grained way by adopting the attribute-based encryption technique. Furthermore, the security analysis and performance evaluation show that our proposal is secure and efficient, respectively.
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