End-To-End encryption with several recipients
<p>WhatsApp announced to support end-to-end encryption for normal conversations and group chats.</p>

<p>Assuming there is no shared private key and it's real end-to-end, then when I send a 10MB video to a group with 10 friends I have to encrypt it 10x and send it 10x ? Otherwise it's not end-to-end for me, because the server must not be able to forward it.</p>

<p>Is that correct? Thanks</p>