Vaadin offline mode and end to end encryption

I am trying to learn Vaadin framework and have been going through the resources on Vaadin website.

I have two questions which so far I have not been able to find a precise answer to.

Since all your business logic is sitting on the server the questions are, can Vaadin do the following with the additional constraint of not using any additional frameworks as much as possible.

1. 
   

   Can Vaadin be used to create applications that offer limited offline capabilities when there is no internet access, (limited to 'view only' mode) without the use of Touchkit.

   
   


2. 
   

   Can Vaadin be used to create applications that implement end to end encryption (any data the user enters is encrypted client side before being sent to server)