Your information entrusted to whatsapp maybe not safe anymore as they have updated their new agreement policy. Whatsapp has agreed to share information on Facebook and its related corporate families to make it for easier for sharing. But some users find this change as a violation of their privacy and trust. That is why whatsapp has given an option to the users from withholding private information like sharing of personal photos and private mobile numbers on Facebook.
Whatsapp has ensured that nothing you share on WhatsApp, including your messages, photos, and account information, will be shared onto Facebook or any of the Facebook family of apps for others to see.