@mistercoin: Indeed.

OP, please provide more information on mistercoin's question and also:

- which version of Bitcoin Core is the base for this one? (best practice would be to deliver the exact Git commit, so a diff can be done!)
- what changes were done to Bitcoin Core?
- what exactly can you make "quantum resistant" with this Bitcoin Core version?

There is the file pqc.md which provides some more info, but it is still not really clear how it works alongside the Bitcoin protocol. In my opinion, according to the description of the "hybrid" system, the keys would be compromised if one of both algorithms "break", so it would be even less secure than the "pre-quantum" ECDSA cryptosystem which is used today.

On the other hand, how would miners/core nodes validate the "new" kind of transaction?

Until this is not answered this may be possibly a wallet stealer, so don't install it until the OP hasn't answered the questions and detailed the changes!. I'm sorry OP but there are a lot of scams of this kind, and it could be possible that someone wants to capitalize from the fear of quantum computers.

The thread is imo also in the wrong subforum as this isn't a support topic, it should go into Project Development or Development & Technical Discussion.