kaepora/cryptocat — comment on commit 98d0e7faef7b11cfbce517bcf0cab78f89502e3e
File: index.php line 296
By polerc:

Hi, I'm a complete newbie to cryptography, so please excuse me if this comment is invalid, but this commit seems to remove a very important feature, which is that now, a user can join the same chat room and see all messages from that point on.

For instance, n users (in our case, Alice and Bob) are chatting, and Eve lands on their chat. Alice and Bob cannot communicate their new chatroom without sending it as a private message, and with large numbers of users, this is impractical and inconvenient.

I would propose re-enabling this as an advanced feature, so that users who have met beforehand can set up a completely secure chat, that even the passerby will not be able to read.