When an application creator creates an application on iXXo, he chooses which validators clusters to trust for the application operations. For example, he could trust US public notaries, French bailiffs and a set of independent nodes, all at the same time, or just choose the cheapest service at any given time. Once deployed, users of this application create secured remote private environments on the cloud (the "dAppBox"). Their private keys are stored securely in offline keys vaults, such as for hardware crypto wallets on your PC to store your Bitcoin.
The user can access directly it's newly deployed application as if it was a remote website, it makes no difference to him.
