The transaction isn't secret after it gets mined in the block and added to everyone's main chain. The only use of this would be to conceal one's IP for the transaction broadcast but it's really not necessary anyway because the bitcoin mesh network does a repeating broadcast from all peers to all peers, of all transactions in the mempool. Just use a secure connection and only broadcast to a single peer that you can verify to be a standard "dumb client." Odds are they won't have any logging of IPs and will rebroadcast the transaction, which will propagate it to the entire network.