And what the difference between STH and SATOSHI?
SATOSHI is also ERC20 token?

SATOSHI ERC20 token can be sent completely anonymously (Zero-knowledge proof). Neither the sender nor the recipient will know each other's addresses.

Is it really possible without changing ETH core? What is the algo or idea of this?

Soon you can try it yourself. A smart contract will be deployed in a few days.

The telegram is not working? What happen?

It says "this chat is no longer accessible" so what happen? How can I participate to this project?

What is your nickname in the Telegram?

@jaysonebarle
Please add me there, I want to be updated in the news.

Your nickname is unlocked.