(*) preventing from this attack because these txs from IOT are considered as honnest and so during attack time they are continuously not approving the attacker txs. So the attacker is alone to increase the cumulative weight of its own txs.
It won't be enough. The overall hash rate of the iota network is impossible to measure since any attacker worth his salt will just sit idle not doing anything with his hashing power until sees an opportunity. Because there is no competition to mine, and iota is designed for tiny, low cpu hardware, it will be trivial to acquire enough hashing power to outpace the rest of the network.
TETO solves this problem completely due to the mining incentive.
Do you plan to launch something ?
I have no plans at this time.