Is there a 🔐 cryptologic solution for 📬 private messages on STEEM?

This is over my head a bit, but I wonder if this is the only way to send a cryptologically secure (private) message to a person on STEEM?

Here's the situation. I want to send financial, personal, medical, legal, marriage proposal, 💏 or secret information to you. Everything is public on STEEM, even that 0.001 SBD message I can send you. I found this on an old post, and followed the comments. I am quoting some things here with sources.

It just hit me, I recently received 0.001 steem from someone with a message attached. I'm not sure if that's the minimum you can send but it probably is. If you really need to send a private message, I guess that's not so expensive. And if you're having a private conversation, you can just send that 0.001 back and forth.

Source: https://steemit.com/steemit/@aaseb/private-messaging-in-steemit-is-already-here (Thanks @aaseb)

But that is wrong!

Here's the key comment where encryption is proposed since the 0.001 SBD transactions are public:

You'd have to send them two messages of 0.001 SBD:

(1) "I encrypted my message with your public posting key. Use your private key to decrypt it"

(2) "ADFPOIUNSDFOIWNUNSUDOPA ..." (encrypted message)

Steemit dev's could implement this, and they could implement it without SBDs involved.

Source: @jcweiss comment

How would that even work?

Please comment on this. I don't know all the steps or whether there is an app that is setup to do this type of encryption. But has anyone heard of or tested a way to encrypt private messages between STEEMians?

UPDATE
I have a screenshot to prove the the hash-tag works to make messages private. Here are the private messages I sent and received @papa-pepper (in STEEM), @meesterboom (outgoing STEEM), and @jiva34 (outgoing SBD)

I am asking these three people to reply below and see if their viewing of my Wallet hides these transaction messages.

Here is proof that I sent/received secret messages:

See comments below, or check my Wallet History of Transfers

I am still in my Introduction phase at introduceyourself. See these posts:
PART 1: The World's Most Dangerous Introduction Post History
PART 2: The World's Most Dangerous Introduction Post Background
PART 3: The World's Most Dangerous Introduction Post Spot, the Legend!
#privacy #steemit #blockchain #crypto-news