Hello @ats-david ! I agree with you, this application is just a better graphical UI to the steem wallet. We still need to give our active key in order to just send messages, which puts our account at risk. In addition, this is not the real Steem Messenger. Here is the REAL Steem Messenger project : https://steemit.com/utopian-io/@kingswisdom/steem-messenger-v0-0-3-private-beta-session-image-encryption-and-many-more

It is off chain, does not require your active permission, nor to access to your funds, it is scalable at ease, and truly unique by design.

I will unveil the security protocol used in Steem Messenger (the real one) this weekend. Stay tuned for more info on this.