Lattice: A Post-Quantum Settlement Layer
This paper proposes a new cryptocurrency protocol for the general public, aiming to provide a quantum-resistant settlement layer in anticipation of quantum computing threats.
Lattice is a new peer-to-peer electronic cash system designed to be a post-quantum settlement layer. It achieves this by integrating RandomX CPU-only proof-of-work, LWMA-1 per-block difficulty adjustment, and ML-DSA-44 post-quantum digital signatures from its genesis block. The system features a 240-second block time after an initial warm-up, a 295,000-block halving schedule, and a perpetual tail emission of 0.15 LAT per block.
We present Lattice (L, ticker: LAT), a peer-to-peer electronic cash system designed as a post-quantum settlement layer for the era of quantum computing. Lattice combines three independent defense vectors: hardware resilience through RandomX CPU-only proof-of-work, network resilience through LWMA-1 per-block difficulty adjustment (mitigating the Flash Hash Rate vulnerability that affects fixed-interval retarget protocols), and cryptographic resilience through ML-DSA-44 post-quantum digital signatures (NIST FIPS 204, lattice-based), enforced exclusively from the genesis block with no classical signature fallback. The protocol uses a brief warm-up period of 5,670 fast blocks (53-second target, 25 LAT reduced reward) for network bootstrap, then transitions permanently to 240-second blocks, following a 295,000-block halving schedule with a perpetual tail emission floor of 0.15 LAT per block. Block weight capacity grows in stages (11M to 28M to 56M) as the network matures. The smallest unit of LAT is the shor, named after Peter Shor, where 1 LAT = 10^8 shors.