|I have to agree with wanderer. The whole point of encryption is to protect your data.|
You want to send data from A to B over an encrypted tunnel, then send it from B to C without the benefit of an encrypted tunnel.
Either do as wanderer said and create an encrypted tunnel from A to C or just send the data from A to C without benefit of encryption since it doesn't seem to be important to you.
When working in the IT industry I have two solid gold rules I live by and they are:
1) If it ain't broke, don't fix it
What you're talking about doing is way overcomplicated. An encrypted tunnel from A to C is KISS
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.