Re: Double-spending with 6 confirmations

2. The attacker sends a transaction only to the victim, all other nodes know nothing about the transaction.

Unless the "victim" is running some non-standard software or have been configured specifically to not broadcast tx's this should not be possible (unless you are saying the attacker owns the victims internet connection).

If the victim broadcasts tx then the attacker receives it.

I thought that your point was that other nodes know nothing about the transaction - how has the attacker stopped that from occurring (i.e. the victim won't only send the tx to the attacker)?