Cool. Very creative and promising project.
But, I am concern about how you prevent from hacker's attack.
I read your whitepaper, but still don't understand how it works.
Good question!!
JOYSO will not hold user's property.
Users shall use individual private key to sign the smart contract of trading.
Despite the smart contract is provided by JOYSO, but JOYSO does not have the ability to move the property inside the smart contract.
That's why JOYSO is anti-hacked.