Abstract: In Internet era, a lot of criminals usually carry out Internet fraud and other criminal activities, using instant messaging software as a medium. This paper takes Aliwangwang as an example, and researches into Aliwangwang’s information storage structures as well as its data encryption algorithm of RC4 and MD5, proposing a distributed computing model based on CUDA to brute force the data encryption algorithm of RC4 and MD5 by exhausting all possible secret keys. The results show this model can get the right encryption key of Aliwangwang’s encrypted file quickly. This research is very useful for computer investigation and forensics in practical use.

Key words: E-commerce, CUDA platform, distributed computing, forensics, instant messaging software

摘要： 互联网时代犯罪分子多以即时通信软件为工具进行网络诈骗等违法活动。为此，以阿里旺旺为例，研究该工具的数据文件存储结构及其RC4和MD5加密算法，提出一种基于CUDA的分布式计算模型。对RC4和MD5加密算法采用穷举所有可能密钥的方法进行暴力破解。实验结果表明，该计算模型能准确快速地完成阿里旺旺加密文件的破解，从而为计算机调查取证工作提供技术支持。

关键词: 电子商务, CUDA平台, 分布式计算, 取证, 即时通信软件

CLC Number: 

• N945