Quantum Computing Threat: 34.6% of BTC at Risk via Time-Window Attacks
A PANews CryptoPulse analysis warns that quantum computing could shift Bitcoin from “static” cryptographic security to “dynamic” time-based defense. Using Shor’s algorithm, the time to derive private keys can shrink from centuries to minutes, creating a potential time-window attack after a transaction is broadcast but before confirmation.
The article cites ARK Invest and Unchained research: about 34.6% of BTC may carry quantum attack risk, while 65.4% is considered safer. The risk is tied to whether a public key is exposed on-chain. Higher-risk holdings include early P2PK addresses, repeated address reuse, and UTXOs that have already been spent—because their public keys are already visible. The piece also notes the “store now, decrypt later” dynamic: attackers can collect data today and decrypt later when quantum capability matures.
On mitigation, the author argues Bitcoin can respond through upgrade paths to post-quantum cryptography. Development efforts include BIP-360 (P2MR), aiming first to reduce public-key exposure using Merkle tree design, then gradually replace ECDSA with PQC. The key market takeaway: the critical question becomes whether upgrades can be deployed fast enough as attack capability improves.
Keywords: Bitcoin, BTC, quantum computing, time-window attack, Shor algorithm, post-quantum, BIP-360, P2MR.
Neutral
该消息的核心是“潜在技术风险”而非“已发生的链上漏洞”。研究给出量化统计（约34.6% BTC可能更暴露），并指出攻击逻辑从长期破解变为交易确认前的时间窗口竞争，同时存在“先存后解密”的跨期风险。但文中也强调比特币具备可升级路径，开发者正在推进 BIP-360（P2MR）等方案，先降低公钥暴露面，再逐步走向后量子密码重构。
对交易的短期影响：市场可能短线重新定价比特币的“安全叙事”与特定地址/UTXO的风险溢价，促使部分资金做风险对冲（偏中性到轻微波动），但不会像真实可利用漏洞那样引发一致性抛售。
对中长期影响：如果升级节奏落后于量子能力进展，市场会把该风险从“理论”转为“定价变量”，导致长期风险溢价上升；反之，若升级里程碑持续推进，类似以往网络升级（安全补丁/共识更改）带来的“可控风险”特征，会让市场逐步回到更稳定的定价框架。
因此更符合“中性”判断：风险被放大到需要关注与跟踪升级进度，但目前仍缺少可验证的即时破坏性事件。