The concept of a peer-to-peer internet ledger of value, recorded as a blockchain and secured by proof of work was rst reported in 2008. Bitcoin remains the most widely used cryptocurrency to date. Hundreds of similar cryptocurrency ledgers have been subsequently created but with few exceptions they rely on the same elliptic curve public-key cryptography (ECDSA) to generate digital signatures which allow transactions to be varied securely. The most commonly used signature schemes today such as ECDSA, DSA and RSA are theoretically vulnerable to quantum computing attack. It would be valuable to explore the design and construction of a quantum resistant blockchain ledger to counter the potential advent of a sudden non-linear quantum computing advance.


ICO Dates
Whitelist / KYC
Token Type
Leon Groot Bruinderink
  • 1
    November 2016

    White paper release.The Winternitz OTS+and Extended Merkle Signature Scheme (XMSS) were identified as the optimal solutions.This investigation also revealed the necessity of QRL to stand alone as a network with interoperability in the later pipeline.

  • 2
    December 2016

    Design of a proof-of-stake algorithm (POS) commenced

  • 3
    January 2017

    Prototype node development with basic POS algorithm and integration of XMSS signatures

  • 4
    February 2017

    Prototype node development with basic POS algorithm and integration of XMSS signatures

  • 5
    April 2017

    Launch of the Alpha testnet with nodes running on MacOS, Linux, Windows on hardware including Raspberry Pi. Private seed presale round opens.

  • 6
    August 2017

    Node optimization with C++. Inter-node encrypted communication (‘new hope’ lattice-based cryptography)

  • 7
    December 2017

    Not willing to compromise a launch with an immature PoS protocol given how much value the project currently carries — and more importantly how much value it will hold in the future, QRL announces a move to temporary Proof of Work model.

  • 8
    January 2018

    Proof of Work public testnet is released to the public

  • 9
    February 2018

    The introduction and solidification of variable key heights and signature space allows us to ensure future compatibility with almost anything. Our blockchain now includes the possibility to upgrade signature schemes (XMSS, SPHINCS, + future).

  • 10
    March 2018

    Our internal code review also compliments the more general internal security review we are currently in the process of conducting.

  • 11
    March 2018

    Audit Completed by red4sec with x41 doing a secondary audit for further scrutiny.

  • 12
    June 2018

    Block Explorer: https://explorer.theqrl.org/.Web Wallet: https://wallet.theqrl.org/.Desktop Wallets: https://github.com/theQRL/qrl-wallet/releases.Release: https://qrl.foundation/assets/QRLF-PR-20180626.pdf