ChainCatcher 消息，Coinkite 旗下硬件钱包 Coldcard 被曝存在严重熵漏洞，该漏洞自 2021 年起未被发现，导致超过 1 亿美元比特币被盗，受害者多为使用单一助记词钱包的用户。弱熵使得攻击者能够通过定制化手段猜测私钥，这一事件促使比特币社区重新审视单签自托管的可靠性。
在此背景下，多厂商多签（Multi-vendor Multisig）方案正成为长期持有者推荐的新托管基线。该方案要求用户使用来自不同钱包厂商的密钥构建多签地址，例如 Trezor Safe 7、Ledger Nano 与 Casa 恢复密钥组成 2-of-3 多签，从而降低对单一硬件厂商的信任依赖。多签还能抵御扳手攻击，并催生了 AnchorWatch 等以 BTC 计价的比特币保险服务。
不过多签也存在缺点，用户除需保管阈值密钥外，还需保存多签脚本或模板副本，以便在钱包服务离线时独立恢复资金。
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