信息工程大学学报2024，Vol.25Issue(1)：45-51,7.DOI:10.3969/j.issn.1671-0673.2024.01.007
7-Zip加密文件快速口令恢复算法研究
Fast Password Recovery Algorithm for 7-Zip Encrypted Files
程鹏文 1颜学雄 2章明3
作者信息
- 1. 61726 部队,湖北 武汉 430079||信息工程大学,河南 郑州 450001
- 2. 信息工程大学,河南 郑州 450001
- 3. 61726 部队,湖北 武汉 430079
- 折叠
摘要
Abstract
With the widespread use of 7-Zip software,the rapid recovery of 7-Zip encrypted file pass-words is of practical significance for electronic forensics in information security.At present,the pass-word recovery of 7-Zip encrypted files mainly depends on 219 rounds of SHA256 to generate AES256 keys combined with CRC verification code,which is inefficient.This paper proposes a fast password recovery algorithm using plaintext characteristics for verification by studying the plaintext statistical characteristics of 7-Zip encrypted files.By analyzing the vulnerability of 7-Zip encryption process,a fast password recovery algorithm using key table for decryption is proposed.The experimental data shows that the algorithm designed in this paper greatly reduces the amount of computation.Compared with the most widely used John cracking software in the industry,its password cracking speed can be improved thousands of times.关键词
7-Zip软件/口令恢复/高级加密标准/安全散列算法2Key words
7-Zip software/password recovery/advanced encryption standard/secure hash algo-rithm 2分类
信息技术与安全科学引用本文复制引用
程鹏文,颜学雄,章明..7-Zip加密文件快速口令恢复算法研究[J].信息工程大学学报,2024,25(1):45-51,7.
