Re: [PRE-ANN][HVC] Heavycoin - CPU-only, Ultra-secure, Decentralized Voting

Specification

CPU-only: Introduces HEFTY1, a novel approach to CPU-only proof-of-work
Ultra-secure: combines SHA-256, Keccak-512, Grøestl-512, BLAKE-512 in a secure way

Could you explain more about these points? Specially the HEFTY1 part, thanks