Our security measures are strong. For example: your generated session token is IP bound, your password is encrypted inside your browser (before sending it to the internet), your session expires every 2 hours, you can even configure safebyte to automatically sign out after a specific amount of minutes (see System/App/Services/Account -> Settings).
But as always: make sure you're the only person knowing the credentials to your account.
When leaving a public computer, always shutdown safebyte by double-clicking at the lock icon.