QDay, Signet, and Trellis Wallet are at the PQA Labs booth at CVCF, 4–5 Nov in Hong Kong. Ask us how a Signet spending session works: a budget, an expiry, and an owner approving it from Trellis Wallet.

Post-quantum signatures are big. Falcon-512 is 666 bytes. ML-DSA-65, the scheme on QDay's migration path, is 3,309. a16z's new Aerie aggregates 32,768 Falcon-512 signatures in 0.65s on a laptop into one proof that verifies in 54ms on a single core. ML-DSA support is on their list of extensions. We'll be following that one closely. 🔐

Accounts on Aevum Testnet today are standard ECDSA. Your keys and tools work as they do on Ethereum. Next on the path: hybrid ECDSA + ML-DSA-65, in progress on testnet. Native post-quantum signing is on the 2027 roadmap. 🔐 An ML-DSA-65 signature is 3,309 bytes, against 65 for ECDSA. That's why verification is planned as a precompile.

Thinking about the Aevum builder challenge in December? Start from what's already live. 🛠️ Today you can deploy and verify EVM contracts on Aevum Testnet and build against ERC-20 test tokens, including USD8. Stablecoin payment features, x402, agent wallets and the official SDK are on the way, with docs at launch. Until the SDK ships, ethers.js, viem and wagmi work as they do on Ethereum. Guide in the comments.

We're planning a 24-hour online builder challenge on the Aevum testnet for early December. 🛠️ The brief: ship one stablecoin payment flow end-to-end using $tUSD8. Think invoicing, payroll streams, crowdfunding, and payee checks. Free to join. Solo or small teams. USDT prizes, plus a bonus for anyone who signs records with ML-DSA post-quantum signatures. Would you build? Tell us in the form 👇

Coinbase urges multi-year PQC work for Bitcoin, emphasizing designs flexible enough for future algorithm swaps. For payment processors, this means scrutinizing stateful vs. stateless signatures like ML-DSA. Balancing low tx costs (stateful) with operational reliability (stateless key management) is critical for routing real volume. $QDAY

A reminder for QDay stakers. QDAY Staking ended today, October 15, 04:00 (UTC). Rewards earned before then are honored under the existing staking rules. The withdrawal window is open until December 31, 2026, 04:00 (UTC). Your assets are safe if you don't withdraw right away, so there's no need to rush. We will never DM you, ask for your seed phrase, or ask you to send tokens to "migrate" or "unlock" them. Only trust qday.io/official-links Full details and FAQ in the comments.

Corey O'Meara (E.ON) on quantum: 'I would say there may be even a little bit too late honestly.' His team's 5-year journey finding quantum advantage in grid optimization highlights the deep organizational lead time. For payment processors, integrating quantum-resistant security for agentic payments requires similar multi-year internal capability building.