Lets say that I have a remote server with dansguardian working with squid. A
computer client connects to the remote server to be filtered. If the client
access a https web, will the data (that comes from the https web) transmitted
from the proxy server to client will still be encrypted?

Access https site:

Client ->Encrypted Data -> Remote Dans with squid server -Encrypted Data ->

Does it works like this post?:
Which says that dans returns encrypted data to client web browser.