Quantum Resistant Ledger (QRL) is a cryptocurrency based on Python (programming language), aimed at combating future attacks by quantum computers. It is also a fully quantum resistant blockchain network, that uses PQ-CRYPTO recommended/IETF standardized cryptography.^[1] 

Overview

Quantum Resistant Ledger is an enterprise-grade cryptocurrency platform built and launched in June 2018 designed to fully secure against quantum computers. The QRL mainnet is an industrial implementation that utilizes IETF specified XMSS, a hash-based, forward secure signature scheme with minimal security assumptions.^[2]

QRL utilizes a hash-based eXtended Merkle tree Signature Scheme (XMSS) instead of ECDSA, which is reportedly vulnerable to quantum attacks and found in many other blockchain projects. The project claims that the security of its platform is complemented by a suite of applications and a development ecosystem which allows users to 'easily build blockchain applications on its provably quantum resistant network'.^[3] 

The Quantum Resistant Ledger (QRL) is a first of its kind, future-proof post-quantum value store and decentralized communication layer which tackles the threat Quantum Computing will pose to cryptocurrencies.^[1]

The Quantum Resistant Ledger (QRL) is a forward-thinking, fully quantum-resistant blockchain network and digital asset platform which uses a secure, audited, and IETF specified implementation of the eXtended Merkle Tree Signature Scheme (XMSS) from its genesis block.^[2] 

QRL is the first fully quantum-resistant blockchain network and digital asset platform. It relies on a third-party audited and IETF specified implementation of the eXtended Merkle Signature Scheme (XMSS), rather than on ECDSA as other blockchains projects do.^[3]