Private group chats are not only about cryptography. They are also about the small decisions people make: who gets invited, how accounts are recovered, what gets forwarded, and whether the app encourages noise or restraint.
Start with smaller groups
The larger a group becomes, the harder it is to keep context private. Keep sensitive family or close-circle chats limited to people who actually need to be there.
Use names that do not expose too much
Group titles can reveal more than users expect. A neutral name is often safer than a title that describes a medical, financial, legal, or family situation.
Protect the recovery email
If your messenger account uses email for verification or recovery, the email account deserves strong security too. Use a strong password and avoid sharing access.