Post-quantum cryptography

QRL

Maintained by theQRL

> Python-based blockchain ledger utilizing hash-based one-time merkle tree signature scheme (XMSS) instead of ECDSA.

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What you can build or learn

Identify which libraries are reference implementations versus production integrations.
Understand how PQC work differs from quantum-computing SDK work.
Find the right starting point for learning or experimentation.

License

MIT

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Q-Day readiness

Open-source PQC libraries support the technical migration. Qtangl supports the operational workflow — inventory, CBOM export, and framework-mapped evidence.

Run Q-Day scan ML-KEM framework guide PQC readiness topic

Repository README

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~187 words · about 1 min readOpen on GitHub

QRL - Quantum Resistant Ledger

Python-based blockchain ledger utilizing hash-based one-time merkle tree signature scheme (XMSS) instead of ECDSA. Proof-of-work block selection via the cryptonight algorithm. Future transition to POS with signed iterative hash chain reveal scheme which is both probabilistic and random (https://github.com/theQRL/pos).

Hash-based signatures means larger transactions (3kb per tx, binary), longer keypair generation times and the need to record 'state' of transactions as each keypair can only be used once safely. Merkle tree usage enables a single address to be used for signing numerous transactions (up to 2^13 computationally easily enough). Currently XMSS/W-OTS+ are natively supported with extensible support for further cryptographic schemes inbuilt.

Documentation

We recommend exploring our Documentation

For instructions on how to install a node, please refer to Install Node

API documentation can be found at api.theqrl.org

More information

theqrl.org
Blog (Medium)
Original Whitepaper (English) or other languages [These documents are subject to change]
Original Proof of Stake document [This document is subject to change]
Discord Chat

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