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Crypto

Bitcoin \'Q-Day\' preparations accelerate as quantum threat solutions split into three tracks

The bitcoin industry and researchers are stepping up work to prepare for a potential future security threat from quantum computers, even though so-called Q-Day remains hypothetical. Efforts are moving on three tracks: quantum-resistant transactions that keep existing rules, upgrades to the bitcoin protocol to adopt new signatures, and stronger custody systems at exchanges and custodians. Each approach has limits, and the key issue is the gap between quantum computing progress and defensive readiness.

Crypto

Satoshi\'s 16-year-old quantum plan forms backbone of Bitcoin BIP-360 and BIP-361

Bitcoin discussions on responding to quantum computers are elevating a design proposed 16 years ago by Satoshi Nakamoto into the basis for formal proposals, including BIP-360 and BIP-361. Developers are testing a method to force cryptographic changes by setting a cutoff at a specific block height. The plan targets exposed ECDSA public keys, but could raise fees by increasing transaction data size and would permanently isolate lost early coins that cannot be migrated.

Crypto

Stellar pursues quantum-resistant migration without address changes, signing key replacement central

The Stellar Development Foundation unveiled QPP, a roadmap to prepare the Stellar (XLM) network for quantum computers, and said it aims to complete a shift of all accounts to quantum-resistant signatures by the end of 2027. The plan is designed to keep existing addresses and transaction histories intact while replacing only signing keys. It outlines a three-stage rollout from 2026, adds NIST-standardised ML-DSA support, and raises dormant-account handling as a remaining issue.