Paradigm 合伙人发布 PACTs 提案，中本聪时代持有者无需移动 BTC 即可证明控制权
ChainCatcher 消息，比特币的量子计算担忧始终存在着一个“中本聪相关难题”。如果性能足够强大的量子计算机问世，存放于公钥已暴露的旧钱包中的数百万枚比特币可能面临被盗风险，这其中包括据称归属于匿名创造者中本聪的约 110 万枚比特币，目前价值约 840 亿美元。
资深开发者 Jameson Lopp 与另外五位开发者于 4 月中旬通过 BIP-361 正式提出这一方案，将以五年时间表逐步淘汰易受量子攻击的地址，并冻结任何未能完成迁移的币。但该提案制造了另一个问题：中本聪以及所有其他长期休眠的持有者将不得不公开“现身”，否则就有失去资产访问权的风险。
Paradigm 普通合伙人 Dan Robinson 周五发布提案，提出一种规避这一权衡的办法，其核心概念是“可证明的地址控制权时间戳”（PACTs）。PACTs 的核心思路并非移动币，而是在特定日期对所有权证明加盖时间戳，且在钱包所有者真正需要花费之前，对外不透露任何信息。
若比特币后期启用一项冻结易受量子攻击币的软分叉，该协议可包含一条接受 STARK 证明（一种对量子计算机仍保持安全的零知识证明）的救援路径，证明持有者在量子硬件存在之前就已创建其承诺。持有者在希望花费时提交该证明，网络即释放相应币。该赎回过程不会透露任何关于地址、金额，甚至原始时间戳创建时间的信息。
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