摘要
针对FAT32文件系统,分析离散存储碎片,提出一种基于部分匹配预测算法PPMC来重构文件碎片的模型。采用PPMC算法确定出任意2个碎片的相邻性概率值,通过剪枝技术逐步加工处理,重构出一个有完整顺序的原文件,并分析系统中的隐藏文件index.dat。
Aiming at on FAT32 file system, this paper emphasizes to analyze scattered fragments of disk files, and proposes a model of reassembling deleted file fragments based on PPMC algorithm. Employed Prediction by Partial Matching（PPM） is used to build a context model and compute candidate probabilities of the possible adjacency of two document fragments, and pruning technology is adopted to process gradually and reassemble a complete file. It also analyzes the hidden file named index.dat in the system.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第9期176-178,共3页
Computer Engineering
