Include security in the WS communication between client and server

**Description**

The communication between the client and server is secure given that we are going to use WWS. The problem here is that the server needs to validate that the client is how it said it is. This is why from the server we can create for a client his personal certificate and this certificate is going to be used by the client at the beginning of the communication for security.

The certificate creation in the server should be covered in the issue:

- [ ] At the connection to the server, the client should send to it the certification and wait for the validation
- [ ] Once the certificate validation is done, the client and server should be ables to interact without problems