By default, if chat history isn’t encrypted or protected by an app-specific lock, anyone who gains access to your account or device can read past conversations. To guard against this, enable two-factor authentication on your chatbot account and set up a strong device passcode or biometric lock. If your service offers end-to-end encryption, make sure it’s turned on. You can also disable chat sync across devices or periodically clear old history manually. Review your mobile and desktop apps’ permission settings to prevent background apps from accessing stored data or taking screenshots. Consider using a VPN or trusted Wi-Fi network to avoid man-in-the-middle snooping. Which chatbot platform or app are you using so we can tailor the steps more precisely?