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ImgFS： a transparent cryptography for stored images using a filesystem in userspace

Frontiers of Information Technology & Electronic Engineering 2015年第1期16卷 28-42页

作者： Osama A. KHASHAN Abdullah M. ZIN Elankovan A. SUNDARARAJAN Centre for Software Technology and Management Faculty of Information Science and Technology National University of Malaysia (UKM) Bangi 43600 Selangor Malaysia

Real-time encryption and decryption of digital images stored on end-user devices is a challenging task due to the inherent features of the images. Traditional software encryption applications generally suffered from the expense of user con- venience, performance efficiency, and the level of security provided. To overcome these limitations, the concept of transparent encryption has been proposed. This type of encryption mechanism can be implemented most efficiently with kernel file systems. However, this approach has some disadvantages since developing a new file system and attaching it in the kernel level requires a deep understanding of the kernel internal data structure. A filesystem in userspace （FUSE） can be used to bridge the gap. Never- theless, ctwrent implementations of cryptographic FUSE-based file systems suffered from several weaknesses that make them less than ideal for deployment. This paper describes the design and implementation of ImgFS, a fully transparent cryptographic file system that resides on user space. ImgFS can provide a sophisticated way to access, manage, and monitor all encryption and key management operations for image files stored on the local disk without any interaction from the user. The development of ImgFS has managed to solve weaknesses that have been identified on cryptographic FUSE-based implementations. Experiments were carried out to measure the performance of ImgFS over image files＇ read and write against the cryptographic service, and the results indicated that while ImgFS has managed to provide higher level of security and transparency, its performance was competitive with other established cryptographic FUSE-based schemes of high performance.

关键词： Storage image security cryptographic file system filesystem in userspace (FUSE) Transparent encryption

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Design of a Secure and Efficient Distributed cryptographic Storage system

引用

China Communications 2011年第2期8卷 66-74页

作者：杨晓元朱率率 The Institute of Information Security Engineering College of Chinese APF Key Laboratory of Network & Information Security of APF Engineering College of APF

Proxy Re-encryption(PRE) is greatly concerned by researchers recently. It potentially has many useful applications in network communications and file sharing. Secure distributed cryptographic file system is one of its applications. But the practical applications of PRE are few. And even fewer of them are tested by systematically designed experiments. Appling a couple of representative algorithms proposed by BBS,Ateniese,Shao,et al.,a distributed file system is designed. In the system,some substitute mechanisms such as data dispersal,dynamic file sharing,are well-applied. A lot of features such as flexible authorization and data redundancy are embraced in the system. The comparison evaluation justified that the system is more practical and efficient.

关键词： cryptographic file system proxy re-encryption file sharing data redundancy

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