5. The Man in the Middle attack.If an attacker succeeds to put himself between a merchant and the RaiBlocks network he can just filter the double spending payment packets, and the merchant will never know that he is receiving a double spending. The Raiblocks network will discard that payment while the merchant will accept it.
https://s18.postimg.org/7pnm6yweh/doublespend.png Couldn't the same MitM attack be used in a bitcoin transaction? Connect to all the peers of a merchant and mine 6 blocks containing the double spend while filtering out all longer blocks so the merchant accepts the transaction as valid.
