Quantum Resistant Ledger (QRL) is a cryptocurrency that runs on its own independent Layer-1 blockchain, launched as a native mainnet in June 2018.
QRL was built specifically to resist attacks from quantum computers, using hash-based digital signatures instead of the elliptic-curve cryptography used by most existing blockchains. The network currently secures transactions through a proof-of-work mechanism and is developing a proof-of-stake, smart-contract-capable successor chain.
QRL's core differentiator is XMSS (eXtended Merkle Signature Scheme), a hash-based signature standardized under IETF RFC 8391 that replaces the elliptic-curve cryptography leaving most blockchains vulnerable to quantum attack.
An independent audit by Halborn, released in April 2026, reviewed QRL's post-quantum cryptography library and found no cryptographic vulnerabilities, validating the underlying signing, verification, and key-generation logic. The project's relevance has also tracked external events, including a documented price move following a BlackRock warning about quantum vulnerabilities in Bitcoin and Ethereum.
QRL is the native utility coin of its own blockchain, used to pay transaction fees and reward miners under its current proof-of-work consensus.
Holders interact with QRL primarily by transacting and by mining. Under the planned QRL 2.0 (Zond) upgrade, the coin's role is expected to extend to staking as the network transitions to proof-of-stake.
QRL has a hard-capped maximum supply of 105 million QRL, issued on an approximate 200-year exponential-decay emission schedule with no Bitcoin-style halvings.
In 2022, community-approved proposal QIP-16 implemented a one-time 60% reduction in the block reward, permanently lowering the emission rate.
QRL launched via an initial coin offering held from May 1 to May 24, 2017, priced at $0.0785 per QRL and raising $4,160,000. This followed a prior angel round of $2,000,000 in January 2017.
The project's whitepaper was published in November 2016, well ahead of its testnet (March 2018) and native mainnet launch on June 26, 2018 — a roughly 19-month gap between whitepaper and functioning chain.
QRL runs on its own independent Layer-1 blockchain, with a native mainnet launched in June 2018 — it is not a token issued on Ethereum, Solana, or any other chain.
The network currently uses proof-of-work (cryptonight-based block selection), with transactions secured by XMSS, a hash-based signature scheme standardized under IETF RFC 8391. QRL is in the process of transitioning to a full proof-of-stake, EVM-compatible successor chain under the QRL 2.0 ("Project Zond") upgrade.
QRL was founded by Dr. Peter Waterland, a cancer surgeon by training, who identified in 2016 that quantum computers threatened blockchain cryptography and founded the project in response.
QRL is maintained by the QRL Foundation ("Die QRL Stiftung"), a Swiss non-profit foundation based in Zug, Switzerland.
The Foundation's stated purpose is development, research, education, and community-building in support of the QRL blockchain, including distributing grants to developers, academics, and technologists working in post-quantum blockchain technology. Its board comprises Peter William Waterland (President), John-Paul Lomas (Vice-President), and Bogdan-Dumitru Gheorghiu, with SIG Fiduciaire SA serving as statutory auditor.
QRL is governed through the QRL Foundation board, which acts as the decision-making body advising on development priorities and digital-asset distribution, combined with a community-facing proposal process for protocol changes.
Protocol-level changes go through a QRL Improvement Proposal (QIP) process; for example, QIP-16 in 2022 was a community-voted, one-time 60% reduction in the block reward. Governance operates as a hybrid of Foundation stewardship and community/developer QIP proposals, without an on-chain token-holder voting mechanism.
QRL's central ongoing initiative is QRL 2.0 ("Project Zond"), a next-generation proof-of-stake, EVM-compatible Layer-1 secured by NIST-approved ML-DSA-87/Dilithium post-quantum cryptography.
QRL's post-quantum cryptography library was audited by Halborn, with results released in an April 2026 press release.
The audit produced 13 findings, all rated Informational (the lowest severity), with no cryptographic vulnerabilities found and all findings resolved via code fixes or documentation. Holder concentration is notable: the top 10 addresses hold approximately 31.39% of circulating supply (the largest being the QRL Foundation itself at 10.6%, followed by the MEXC exchange at 4.78%), and the top 25 hold approximately 44.85%, across 19,885 total holder addresses. Daily trading volume of roughly $27,429 represents thin liquidity relative to QRL's market capitalization.