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23 October 2009 A new cryptographic read/write flow for networked storage system
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With the networked storage becomes a tendency of data storing, the data stored on storage device gradually becomes the major goal of the malicious attackers, and the storage system becomes the final defense line to safeguard data security. To strengthen the confidentiality of data, this paper designed a new cryptographic read/write flow for networked storage system. On the base of the optimized data read/write flow, we implemented a Kernel-based Cryptographic File System (short for KCFS). The cryptographic file system can overcome the inconvenience of encryption application and the low efficiency of user-level encryption file system, e.g CFS, so as to realize the encryption/decryption function at the kernel-level file system, providing the upper-level application a transparent storage space. Additionally, the data is stored in cipher-text mode, so can protect the stored data from illegal exposure. In the comparative experiment, the transferring rate of NFS+KCFS reduces between 9.2% and 13.2% relative to NFS, and the transferring rate of NFS+CFS reduces between 18.6% and 30.1%. The experiment shows that KCFS can reach better read/write performance compared to user-level encryption file system.
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Canhao Pei, Changsheng Xie, and Jianzhong Huang "A new cryptographic read/write flow for networked storage system", Proc. SPIE 7517, Photonics and Optoelectronics Meetings (POEM) 2009: Optical Storage and New Storage Technologies, 75170V (23 October 2009);

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