【摘要】 提出了密钥分解问题的向量空间投影理论,由此给出了密钥分解算法,并且将该理论和算法引入文件分割问题的研究中,给出了一种应用于实际保密场合的文件安全分割及恢复算法,并与传统文件分割算法进行了比较。利用分组密码的原理,将文件先分组再分存。实现了将文件分割成个子文件,而利用其中任意(1≤≤)个子文件可以恢复原文件,为重要文件的存储和传输提供了安全保证。同时对在通信保密中实现信息的分解保密提出了建议。更多还原

【Abstract】 The vector space projection theory about key assignment problem is proposed first,then the key assignment algorithm is pro-duced.Furthermore this theory and algorithm is used to study file-splitting,and an algorithm about file splitting and recovering is given in the actual situation of information security.It is compared with the traditional file-splitting.According to the principle of block cipher,a file is distributed before divided into some groups.In the algorithm one file is split into to sub files,and is recovered from any m(1≤m≤n) sub files.Thus the safety guarantee for the important files store and transmission is provided.At the same time,some advice is given to the information assignment and confidentiality in the field of communication encryption.更多还原