In today's highly developed Internet era, many people consider privacy and security issues when using the Internet. Especially in some scenarios where personal information needs to be protected, such as the use of instant messaging tools like QQ, there is a greater need to consider the issue of network security. And whether using a proxy server to chat on QQ will leak confidentiality has become a topic of concern for many people.

### Role of the proxy server
A proxy server is a server that acts as a middleman, sending requests instead of the client and returning responses to the client. In network communication, a proxy server can hide the real IP address of the client, improve access speed, bypass some network restrictions and other effects.

### Possible risks of using a proxy server to chat on QQ
However, using proxy servers for QQ chatting may also involve some risks. Some free proxy servers or untrustworthy proxy servers may monitor messages, which may lead to the leakage of users' chatting contents. Especially in business negotiations, personal privacy and other scenarios that require high confidentiality of information, you need to be extra careful when using a proxy server to chat on QQ.

In addition, some malicious proxy servers may also steal sensitive information such as user's account code by means of man-in-the-middle attacks and other means. Therefore, when choosing a proxy server, you need to choose a trusted and regular service provider to avoid information leakage due to improper use.

Through the above discussion, we can see that when using a proxy server to chat on QQ, you should be careful in choosing a proxy server to avoid information leakage due to improper use. For some important chats, it is better to do it directly in a safe and reliable network environment to ensure the safety of the information.