This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
But it does support chats/DMs, and there was an FEP for chat encryption
Sup software does this: https://github.com/thesupapp/server