> ## Content Index > Fetch the complete content index at: https://z-text.org/llms.txt > Use this file to discover other available public pages before exploring further. # Q-Day Ready: The BitcoinZ Quantum Readiness Plan - URL: https://z-text.org/q-day-ready-bitcoinz-quantum-plan/ - Published: 2026-11-02T11:55:50.000Z - Updated: 2026-11-02T12:36:34.000Z - Description: A free, open proposal from Z-TEXT for the BitcoinZ community. Small, cheap steps first, no fork to start. Then the big upgrade. Quantum-resistant, never quantum-proof. - Author: Eric Pierrot - Founder, Z-TEXT LLC — building privacy tools without phone numbers, email, or metadata. - Tags: BitcoinZ, Quantum, Security, Z-TEXT ![Z-TEXT privacy bird](https://storage.ghost.io/c/fd/15/fd15bb3d-d8d8-469e-8b80-b94dae7aa4cd/content/images/2026/05/my-bird.png) Z-TEXT is a private messaging app built on the BitcoinZ blockchain. No phone number, no email, no SIM. Today Z-TEXT publishes a free proposal for the whole BitcoinZ community: **Q-Day Ready, the BitcoinZ Quantum Readiness Plan.** **In short** Q-Day is the day a quantum computer can break today's wallet math. On October 21, 2026, a classic bug already let an attacker print 105 billion fake BTCZ. Q-Day Ready proposes five phases: cheap fixes with no fork first, quantum-resistant coin signatures last. Nothing is funded yet. Z-TEXT shares the design for free. ## ❓ 1\. What is Q-Day? Q-Day is the day a large quantum computer can break the math that protects most crypto wallets today. Nobody knows when Q-Day comes. Every serious blockchain is preparing for it. *Mini-resume: Q-Day is the future day a quantum computer breaks the cryptography behind most crypto wallets. Its date is unknown, so blockchains prepare now.* ## ❓ 2\. Why does BitcoinZ need a plan now? On October 21, 2026, an attacker created 105 billion fake BTCZ in block 1,860,181\. That's five times the 21 billion maximum supply. The attack wasn't quantum. It used a classic bug. That's the warning. If a classic bug could do this, a future quantum computer could too. Honestly, we think waiting would be the real risk. *Mini-resume: The October 21, 2026 BitcoinZ attack created 105 billion fake BTCZ with a classic bug, not a quantum one. It showed BitcoinZ must harden now, before Q-Day.* ## ❓ 3\. What does Q-Day Ready propose? Small, cheap steps first. No fork to start. The big upgrade last. **Phase 1 · Quick wins · No fork** Wallet hygiene guide, fresh t-address after each shield, public supply page, bridge safety settings. **Phase 2 · Small builds · No fork** Independent supply monitor with alerts, Mailbox + Vault wallets, bridge supply check. **Phase 3 · Fix the foundations · Consensus release** Sapling turnstile overflow fix, independent code audit. **Phase 4 · Harden · No fork** Proof re-checker, incident drills, bug bounty. **Phase 5 · The big upgrade · Soft or hard fork** Quantum-resistant signatures for BTCZ coins. *Mini-resume: Q-Day Ready has five phases. Phases 1, 2 and 4 need no fork. Phase 3 is a consensus fix. Phase 5 adds quantum-resistant signatures for BitcoinZ coins.* ## ❓ 4\. What does Z-TEXT already protect? Z-TEXT message encryption uses hybrid X25519 + ML-KEM-768\. ML-KEM is the NIST post-quantum key exchange standard, FIPS 203\. It's live in Z-TEXT since version 3.7.0 beta. But Z-TEXT message signatures are still classical Ed25519\. And BitcoinZ coins themselves are outside Z-TEXT's scope. (Yes, we'd love to say more. We won't claim what isn't built.) *Mini-resume: Z-TEXT encrypts message text with quantum-resistant ML-KEM-768 since version 3.7.0 beta. Z-TEXT signatures remain classical Ed25519, and BTCZ coins need the community plan.* ## ❓ 5\. Who needs to help? Wallet developers, mining pools, bridge operators, exchanges, BitcoinZ core developers, security reviewers and holders. If you hold BTCZ, this plan is about your coins. *Mini-resume: Q-Day Ready needs the whole BitcoinZ community: developers, pools, bridges, exchanges, reviewers and holders.* ## ❓ 6\. Is Q-Day Ready funded or scheduled? No. Q-Day Ready is a proposal for discussion, not a promise. Each step needs a builder and a funder. Z-TEXT shares the research and the design for free. *Mini-resume: Q-Day Ready is not funded or scheduled. It's an open proposal, and Z-TEXT gives the design away free.* ## 📄 Download the full plan (PDF, 15 pages) [QDayReadyQDayReady.pdf182 KBdownload-circle](https://z-text.org/content/files/2026/11/QDayReady.pdf "Download") Read it, challenge it, improve it. Feedback is welcome from everyone in the BitcoinZ community. **Sources:** [NIST PQC standards FIPS 203, 204, 205 explained](https://www.encryptionconsulting.com/nist-pqc-standards-fips-203-204-205/?ref=z-text.org) [BitcoinZ official site](https://getbtcz.com/?ref=z-text.org) [Z-TEXT](https://z-text.com/?ref=z-text.org) Keywords: quantum-resistant messaging app · BitcoinZ quantum plan · Q-Day · blockchain messenger · zero-knowledge proof messenger · private messaging app · no phone number messaging app 🔗 **Also read:** [Signal vs Z-TEXT](https://z-text.org/signal-vs-z-text-gold-standard-vs-next-generation/) · [WhatsApp vs Z-TEXT](https://z-text.org/whatsapp-vs-z-text-you-are-the-product-vs-you-are-the-user/) · [Session vs Z-TEXT](https://z-text.org/session-vs-z-text-two-no-phone-messengers-compared/) · [Telegram vs Z-TEXT](https://z-text.org/telegram-vs-z-text/) · [Z-TEXT 4-in-1](https://z-text.org/one-blockchain-messenger-four-apps-replaced/) · [The Third Man](https://z-text.org/the-third-man-had-tunnels-z-text-has-blockchain-2/) 🔗 Share [X](#) · [Telegram](#) · [WhatsApp](#) · [Facebook](#) · [LinkedIn](#) · [Copy link](#) [⬇️ Download Z-TEXT](https://z-text.com/packages?ref=z-text.org) ![Z-TEXT privacy bird](https://storage.ghost.io/c/fd/15/fd15bb3d-d8d8-469e-8b80-b94dae7aa4cd/content/images/2026/05/my-bird.png)