Is your AI chatbot keeping your secrets?

The companies behind popular AI tools typically store your conversation history by default. They can use this information to teach their AI how to be smarter, share it if they receive a legal demand like a subpoena, or even hand it over to law enforcement. While some companies now offer enterprise-level contracts called zero data retention that promise to delete records immediately after they are processed, these are rarely available to individual users. Instead, most people must rely on company privacy policies, which are simply promises that the provider will not save or look at what you type.

To understand the privacy risks, think of an AI model as an apprentice that never forgets. When you send a message, the apprentice reads it, processes it, and stores a copy in a massive filing cabinet. If the company uses that data for training, your secrets essentially become part of the textbook that teaches future versions of the AI. Some newer services act as a middleman, or proxy. This is like hiring a secure courier to strip your name off your letter before handing it to the librarian. While this offers some protection, it is not a perfect shield, because the content of your message itself might contain enough personal details to identify who you are. This is very different from secure messaging apps, which use a technique called end-to-end encryption to mathematically scramble your words so that only the intended recipient can read them, ensuring even the service provider cannot see the content.

As AI becomes a tool for everything from work brainstorming to personal advice, we are creating permanent, searchable records of our private thoughts. The stakes are rising, as security researchers have found that AI can now be used for malicious purposes, such as autonomous software that hunts for login credentials. When you use a chatbot, you are not just having a conversation; you are building a profile that lives on a server outside your control. Until privacy is guaranteed by math rather than just corporate promises, the best rule of thumb is to never tell a chatbot anything you wouldn't be comfortable seeing in an email to a stranger.