基于密文策略属性基加密系统访问机制的缓存替换策略

发布时间：2018-07-05 02:54

本文选题：属性策略 + 缓存替换策略　；参考：《计算机应用》2017年10期

【摘要】：为提高基于密文策略属性基加密(CP-ABE)系统的数据缓存性能,针对CP-ABE加密的数据,提出一种有效的缓存替换算法——最小属性价值(MAV)算法。该算法结合CP-ABE加密文件的访问策略并统计高频属性值的个数,利用余弦相似度方法和高频属性值统计表来计算属性相似度;同时结合属性相似度和文件大小计算缓存文件的属性值价值,并替换属性值价值最小的文件。在与最近最少使用(LRU)、最不经常使用(LFU)、Size缓存替换算法的对比实验中,针对CP-ABE加密后的数据,MAV算法在提高加密文件请求命中率和字节命中率方面具有更好的性能。
[Abstract]:In order to improve the data cache performance of CP-ABE based ciphertext policy attribute base encryption (CP-ABE) system, an effective cache replacement algorithm, minimum attribute value (MAV) algorithm, is proposed for CP-ABE encrypted data. The algorithm combines the access strategy of CP-ABE encryption file and counts the number of high-frequency attribute values. The method of cosine similarity and the statistical table of high-frequency attribute values are used to calculate the attribute similarity. At the same time, the attribute value of the cached file is calculated by combining attribute similarity and file size, and the file with the lowest attribute value is replaced. In comparison with the most recently used (LRU) and least frequently used (LFU) size cache replacement algorithms, the CP-ABE encrypted data MAV algorithm has better performance in improving the hit and byte hit rates of encrypted files.
【作者单位】：国网浙江省电力公司信息通信分公司;华东师范大学计算机科学与软件工程学院;
【基金】：国家电网科技项目(5211XT160008)~~
【分类号】：TP309.7;TP333

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