Draft:Quantum Resistant Ledger

• Comment: Almost wholly AI generated Sulfurboy (talk) 20:07, 5 October 2026 (UTC)

• Comment: In preparing this draft, I disclose that AI assistance was used as follows: I used translation tools like google translate in certain parts to better structure the texy, as I'm not a native speaker Blockchainalysis (talk) 20:05, 5 October 2026 (UTC)

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Quantum Resistant Ledger (QRL) is a blockchain platform and cryptocurrency built to withstand attacks from quantum computers. It uses post-quantum cryptographic algorithms with the aim of protecting digital assets over the long term. The original network (QRL 1.x), a proof-of-work chain, launched in June 2018. A successor network, QRL 2.0 (codenamed Project Zond), is in public testnet as of October 2026.

Overview

QRL was created in response to concern that quantum computers could undermine the cryptography that secures most blockchain networks. Bitcoin, Ethereum and Ripple, for example, rely on elliptic-curve cryptography (ECDSA) and RSA-based methods, which are theoretically vulnerable to quantum attack.

To reduce this risk, QRL uses the eXtended Merkle Signature Scheme (XMSS), a hash-based digital signature scheme approved by the National Institute of Standards and Technology (NIST) for post-quantum use. The design aims to resist both classical and quantum attacks.

Technology

The project has described itself as one of the first blockchains designed from the outset around quantum resistance. According to the project, building this into the core protocol offers several advantages:

• Verifiable quantum resistance: XMSS is NIST-approved, which the project presents as a firmer basis than post-quantum approaches that are experimental or hybrid.
• Forward security: if private keys are compromised in the future, past transactions remain secure.
• On-chain lattice key storage: allows for future cryptographic upgrades.
• Post-quantum secure messaging layer: a communication layer that uses post-quantum cryptography.

Quantum threat to existing cryptocurrencies

Quantum computers could, in principle, factor large numbers and solve discrete logarithm problems efficiently. Researchers have raised concerns that they could:

• derive private keys from exposed public keys, compromising wallets;
• forge digital signatures and authorise unauthorised transactions; and
• disrupt consensus by changing the computational effort needed to solve proof-of-work puzzles.

These risks are currently theoretical, although the cryptographic community broadly accepts that sufficiently advanced quantum hardware could endanger existing systems. The timeline for practical attacks is uncertain, and some experts expect many blockchains will have time to move to quantum-safe algorithms beforehand.

QRL 2.0 (Project Zond)

QRL 2.0 is a planned successor to the original QRL network. It was developed under the codename Project Zond, and the project's lead developer has described Zond simply as QRL 2.0. The native asset remains QRL. The upgrade moves the network from proof-of-work to proof-of-stake and adds smart contract support, which QRL 1.x lacks. Source code is open and developed in public repositories.

Cryptography

QRL 2.0 uses ML-DSA-87 (formerly CRYSTALS-Dilithium 5), a lattice-based signature algorithm standardised by NIST in FIPS 204, to protect transactions and validator operations. This replaces the stateful XMSS scheme of QRL 1.x. The roadmap schedules SPHINCS+, and possibly other post-quantum signature schemes, for integration after mainnet launch. Earlier project material had instead said SPHINCS+-256s would replace XMSS.

Weekly development reports in 2026 also describe work on Falcon-1024 and ML-KEM-1024 (Kyber) in the project's cryptography library, go-qrllib, for use in the peer-to-peer layer. The network is also designed for cryptographic agility, so algorithms can be changed later.

Execution environment

QRL 2.0 uses the QRL Virtual Machine (QRVM), an execution environment forked from the Ethereum Virtual Machine (EVM). Contracts are written in Hyperion, a fork of Solidity. Most valid Solidity code is also valid Hyperion, with added post-quantum cryptographic primitives such as native verification of ML-DSA-87 signatures. Developers need QRL-adapted tooling to compile and deploy Hyperion contracts, though the changes to existing Ethereum tooling are described as minimal.

Consensus and staking

The network uses proof-of-stake consensus, and users have been able to stake QRL on the testnet since the Testnet V2 release. Testnet parameters reported in September 2026 include:

• a minimum validator deposit of 2,000 QRL;
• a cap of 4,096 active validators "for now";
• committees of up to 32 validators, with at most four attestations per block; and
• a worst-case block size of about 8.69 MB, assuming a 20 million gas limit.

The project states that other parameters were still under review. Sync committees were enlarged from 16 to 128 members to strengthen security for light clients.

Differences from Ethereum

QRL 2.0 resembles Ethereum in its EVM-derived virtual machine, Web3-style API, developer tooling and browser wallet. Because post-quantum signatures are much larger than elliptic-curve signatures, the network makes several trade-offs:

Feature	Ethereum	QRL 2.0 (per QRL Foundation)
Block time	About 10–15 seconds	60 seconds
Epoch length	—	128 slots (about 128 minutes)
Epoch finalisation	About 16 minutes	About 4–6 hours
Block size	—	Larger, with higher bandwidth and disk requirements

Addresses and denominations

QRL 2.0 uses its own address format. It begins with the prefix "Q" and includes a cryptographic descriptor to support future algorithm changes. During 2026 the project moved to 64-byte addresses and 64-byte (512-bit) virtual-machine words, a change that touched the execution client, compiler, wallets and libraries. The project renamed Ethereum-derived terms: ERC tokens became QRC, and the units are called Planck and Shor.

Migration from QRL 1.x

Holders of QRL 1.x tokens are to migrate to QRL 2.0 through a smart contract on the new mainnet, using a user-initiated claim process instead of a centralised mechanism.

Developer tooling

Tooling includes a Web3-style JavaScript library (web3.js), a browser-extension wallet with a Ledger hardware-wallet app, a block explorer, Vortex (a Remix IDE-based development environment) and a Hyperion extension for Visual Studio Code. The execution and consensus clients are named go-qrl and qrysm.

Development timeline

Date	Milestone
2016	QRL development begins
June 2018	QRL 1.x mainnet launches
December 2022	Public devnet pre-release
Q1 2024	Beta testnet
Q1 2025	Testnet V1
31 March 2026	Testnet V2, described as the audit-ready release and the tail end of a code freeze
September 2026	Testnet V3 announced as pending, with configuration changes, upstream fixes and an internal audit outstanding
TBD	Mainnet, with no date set; launch depends on audit results and network stability

Security audits

The QRL 1.x network was audited by Red4Sec and X41 D-Sec. For QRL 2.0, multiple independent audits are under way, and the project says mainnet launch is contingent on their completion. Reported milestones include:

• a review of two cryptographic libraries completed on 3 April 2026, with the project reporting that Halborn found no cryptographic vulnerabilities and rated all 13 findings informational;
• publication of the go-qrllib audit results on 4 August 2026;
• completion of an audit and remediation of the Ledger app; and
• audit progress that the project put at 55% on 11 September 2026.

Trail of Bits was named as an auditing vendor in March 2026. The project also reviewed its ML-DSA implementation against attacks described in a paper by Daniel J. Bernstein and reported that it was not affected.

Intended use cases

The project has proposed uses including decentralized finance, NFT platforms, on-chain voting and governance, and decentralized identity systems, and it has pitched the network as a destination for assets from chains that are more exposed to quantum attack.

Tokenomics

QRL has a maximum supply of 105 million tokens, with emission decaying exponentially over 200 years. As of October 2026, about 79.8 million QRL are in circulation, and 8.45 million are held in reserve by the QRL Foundation.

Importance and competitive landscape

Quantum computing is widely seen as a major challenge for modern cryptography, and QRL's approach of building resistance into its core design made it one of the first blockchain projects to address the problem directly.

Competition in post-quantum cryptography is growing and the field is moving quickly. Research groups are studying hybrid cryptographic frameworks and scalable lattice-based protocols that could be more efficient or flexible. QRL's approach has been noted to carry trade-offs, including larger transactions and more computational overhead than traditional elliptic-curve systems.

Criticism

QRL has drawn several criticisms:

• Performance and scalability: XMSS produces larger signatures and slower verification, which can limit scalability.
• Adoption: the focus on post-quantum security has attracted a technical audience, but mainstream adoption and developer engagement remain limited.
• Timing: some experts argue the project addresses a problem that is not yet urgent, since no quantum computer can currently break today's cryptography.
• Competition: Bitcoin and Ethereum are exploring quantum-safe upgrade paths, which could erode QRL's early-mover advantage.

QRL 2.0 carries similar trade-offs, including slower finalisation, larger blocks and a mainnet that has yet to launch. Its long-term success will depend on balancing theoretical protection against practical performance and ecosystem growth.

Current status

As of October 2026, QRL 1.x remains an active network, and its token is listed on several exchanges. QRL 2.0 is in public testnet with audits ongoing and no mainnet date announced.

See also

• Post-quantum cryptography
• National Institute of Standards and Technology

External links

• Official website