Analysis of encryption mechanism in Office 2013

Microsoft Office is the most popular office software. Office document security is mainly carried out through encryption by the software encryption function. But as the new decoding method is put forward and the computer speed is accelerated rapidly, the document security has been questioned. This paper analyzed the whole process of Office 2013 file encryption/decryption, designed a contrast experiment with the former version of Office 2010, then cracked respectively the password on CPU computing computer and GPU computing platform by password brute-force method, and experimental data were obtained with time as the indicator. It was discussed whether Office 2013 encrypted files were safe.