【摘要】 Microsoft Office是使用最为广泛的办公软件,Office文件的安全性主要是通过对Office文件进行加密来实现的。尽管自Office97发布以来,Microsoft公司对Office办公软件的文件加密功能进行了不断改进,但是,Office加密文件的安全性仍然难以保证。通过对Office文件加/解密过程进行分析,提出了存在的攻击,同时分析了各版本Office所采用的具体加/解密算法,设计了破解实验,得出了实验测试数据,并以时间代价为指标,对Office加密文件是否安全进行了详细的论证。更多还原

【Abstract】 Microsoft Office is the most widely used office software.Office security is mainly carried out through encryption.Since Office97 was released,file encryption function of Microsoft Office software has been continuously improved.However,Office document security encryption is still difficult to ensure.This paper analyzed the process of Office file encryption/decryption,and the existence of the attack,and various versions of Office encryption/decryption algorithms.The cracking experiment were designed,and experimental data were obtained with time as the indicator.It was discussed whether Office encrypted files were safe.更多还原