To ensure that your Whatsapp sexting number remains secure and private, it is important to take a few steps. Make sure that you only share your phone number with people whom you trust and are comfortable communicating with. Never share any personal information or photos over Whatsapp, as this can be used for identity theft or other malicious activities. Consider using an additional layer of security such as a virtual private network (VPN) to encrypt your messages and keep them away from prying eyes.