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So in short, how does the end of the route decrypt the traffic originating from myself, without making any contact with me (the entire point of tor) without passing a key along? If the source would know the destiniation, to say provide it with a public key, then the destination would know who the source is defeating the purpose of the onion route???
Yes, a symetrical key is passed along. The reason why the destination will not know where you are lies in this statement from the folks over at TOR: