I notice there are some unreasonable places in Whitepaper. If a Sidechain is responsible for their own security. Without sufficient strength to protect a sidechain, it can be attacked. Because each sidechain is independent, if the sidechain is attacked or compromised, the damage will be contained in that chain and will not affect the main chain. In contrast, the main chain should be compromised, the sidechain still able to operate, but the latch will lose most of its value.