[crispyporkbites]

I don’t think that works at all? Your buddy would have to mine that specific block to get the reward, which is based entirely on chance. You’d also have to spend as much on the POW electricity and hardware to have a chance of getting reward anyway.

[Aissen]

If you know you mine blocks regularly (e.g once per day or week), it's entirely doable. It's the miners who chose what transactions go into a block. In this scheme, the transaction is "secret", only one miner received it.

[goldenkey]

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.

[dopidopHN]

Yeah unless your buddy is a mining pool, I don’t follow how that would work as well.

[Aissen]

Yup, for Bitcoin it would mean having the mining power of a big pool, indeed.