Abstract: Concerning the low efficiency of data update and low security of mobile terminal, a storage and segmentation encoding technology was proposed. Firstly, the data of mobile terminal was equally segmented and stored in cloud,then each segment of data was marked by coding techniques; secondly, the corresponding data block information was downloaded to update when users update the data; finally, the updated data was re-encoded, and cryptographically uploaded to the cloud in appropriate position to form a complete data to be stored. The experimental results show that compared with traditional mobile security solution including Advanced Encryption Standard (AES) scheme and Regenerating Code (RC) coding technique, the proposed model can save file conversion time when the data is updated frequently in cloud, and significantly reduce the performance overhead of the mobile terminal. The proposed model can significantly improve the efficiency of updating data and resource utilization rate of mobile terminal, and effectively strengthen the confidentiality and integrity of mobile cloud data,it has obvious advantages for the demand of updating mobile terminal data frequently.

Key words: encryption, mobile cloud security, storage and segmentation, resource utilization rate

摘要： 针对移动终端频繁更新数据效率低、安全性不高的问题,提出一种基于加密技术和编码技术的存储分割编码技术。首先,将移动终端的数据进行等分分割后存储在云端,通过编码技术标记每份数据;然后,用户在更新数据时下载相应数据块信息进行更新;最后,更新完的数据块通过重新编码,加密上传到云端相应位置,组合成完整的数据进行存储。实验结果表明,相比传统移动云安全方案(AES加密方案和RC编码),存储分割编码技术在频繁更新云端数据时节省了文件转换时间,同时大幅降低了移动终端的性能消耗。该方案能够显著提高更新数据的效率及移动终端的资源利用率,同时有效增强了移动云数据的机密性和完整性,对于移动终端频繁更新云端数据的需求,具有明显优势。

关键词: 加密, 移动云安全, 存储分割, 资源利用率