白皮书关于Phoenix的补充说明里有一句原文让我反复琢磨,说新增了“identifying the sender of a Phoenix transaction to the receiver”的能力,目的就是“turning Phoenix from an anonymity protocol into a privacy-preserving protocol that is compliant with current EU regulations”。为了合规,把匿名属性调整为可识别发送者的隐私保护模式。再翻到共识机制那节,节点要参与SBA共识得提交DUSK竞标,白皮书Section 3说得很清楚,等于把隐私保护嵌进共识层,但代价是节点得完成身份验证。白皮书Section 1开篇就说要“allow users, exchanges, and institutions to transact both publicly and privately”,这套设计处处在算同一笔账。