[bitcoindev] Re: Proposal for Quantum-Resistant Cryptography in Bitcoin - BIP Submission

[Jon Atack <jonnyatack@gmail.com>]

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Hi Agustin,

Good to see!

Have you seen the work-in-progress BIP draft at 
https://github.com/bitcoin/bips/pull/1670?  It may be good to review each 
other (and possibly collaborate).

Discussions/references to that draft:
* https://groups.google.com/g/bitcoindev/c/Aee8xKuIC2s/m/cu6xej1mBQAJ (Mailing 
list discussion)
* https://delvingbitcoin.org/t/proposing-a-p2qrh-bip-towards-a-quantum-
resistant-soft-fork/956?u=cryptoquick (Delving Bitcoin discussion)
* https://bitcoinops.org/en/newsletters/2024/06/14/ (Bitcoin Optech 
newsletter)
* https://bitcoinops.org/en/podcast
/2024/06/18/#draft-bip-for-quantum-safe-address-format (Bitcoin Optech 
discussion transcript)

Best regards,
Jon

On Thursday, October 17, 2024 at 5:06:34 PM UTC-6 Agustin Cruz wrote:

Dear Bitcoin Developers, 
I would like to propose a Bitcoin Improvement Proposal (BIP) that aims to 
introduce quantum-resistant cryptography to the Bitcoin protocol. With the 
rapid advancement in quantum computing, this proposal outlines the 
integration of post-quantum cryptographic algorithms (SPHINCS+ and 
Dilithium) to safeguard Bitcoin’s long-term security.
 
The key points of the proposal are: 
- Introduction of quantum-resistant signature algorithms (SPHINCS+ and 
Dilithium). 
- New Bech32-based address formats for quantum-resistant addresses. 
- Modifications to transaction structures and script opcodes to support 
larger signature sizes. 
- A transition mechanism through a soft fork to ensure backward 
compatibility with existing Bitcoin addresses and transactions. 

The full BIP draft is available here 
https://github.com/chucrut/bips/blob/master/bip-xxxx.md for your review and 
feedback. I look forward to the community's input and am open to 
suggestions on how to improve the proposal. 

Best regards,
Agustín Cruz

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