Business Insider: How FBI's 'encrypted' chat app got its start, according to lea
d prosecutor.
[1]https://www.businessinsider.com/how-fbi-fake-encrypted-chat-app-got-off-the-g
round-2021-6

References

   1. https://www.businessinsider.com/how-fbi-fake-encrypted-chat-app-got-off-the-ground-2021-6