Yes, lock them up in the cupboard and hope I don’t find the key cause I 
chocolate chip cookies.
P.s: The traffic you want to secure is from the client to the server (that includes the so called cookies) and back. That is done via https. Even if you somehow, by a miracle, find a way to secure the cookies part only, then it serves no purpose.
On a side note: Seems like you need help. Private message me the https issue and let me see if I can help you.