xiangfeimco

Missing checks on membership of r in multiplicative group

1

This issue refers to https://github.com/ZenGo-X/rust-paillier/blob/57fc04d28ac58bfde387305e44715aa95cc3033d/src/core.rs#L325 Ideally, the `r` chosen here should be coprime to `N` in [general Paillier scheme](https://en.wikipedia.org/wiki/Paillier_cryptosystem#:~:text=The%20Paillier%20cryptosystem%2C%20invented%20by,believed%20to%20be%20computationally%20difficult). The sampling here does not check if this is true. There...