It seems that the new blockchain is a hardfork of Ethereum, a faster version with cheaper fees, but I doubt it is secure.
Nautilus(NTL) Karlsenhash algorithm, Nexellia(NXL) Karlsenhash algorithm, Karlsen(KLS) Karlsenhash algorithm - 1 second
Conflux(CFX) Octopus algorithm - 0.5 second
I haven't heard of any security issues with these blockchains and I've only written a few coins. In fact, there are many more of them.