Can someone steal your data including the authenticator code from your application via Bluetooth?

It is technically possible for someone to steal your data, including the authenticator code from your application via Bluetooth, but it would require a very specific set of circumstances.

For example, someone could potentially intercept Bluetooth signals between your device and the server you’re communicating with, and use that to steal your data. However, this would typically require the attacker to be physically close to your device and have specialized equipment and expertise.

Additionally, many modern authentication applications, such as Google Authenticator or Microsoft Authenticator, use time-based one-time passwords (TOTP), which expire quickly and are only valid for a short period of time. This makes it more difficult for an attacker to steal your authentication code, as they would need to intercept it during the short window of time that it is valid.

To reduce the risk of data theft over Bluetooth, it’s important to keep your device and any connected devices up-to-date with the latest security patches and to use strong, unique passwords for your accounts. You can also use two-factor authentication, such as an authenticator app or a physical security key, to add an additional layer of security to your accounts.