有没有真正只在客户端处理密钥的Proton Drive替代方案？
我一直在研究加密云存储，特别是Proton Drive、Tresorit、Sync等。<p>我注意到的一点是，即使在一些零知识系统中，服务器仍然会接收到用户密钥的加密版本。<p>我很好奇：有没有哪种云存储系统的加密密钥在任何形式下都**不会**离开客户端设备？<p>附加问题：人们对一种系统的看法如何，在这种系统中，用户可以在不失去访问权限的情况下重置密码，通过将登录凭据与加密密钥分开？<p>希望听到社区的看法。
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I’ve been researching encrypted cloud storage, especially Proton Drive, Tresorit, Sync, etc.<p>One thing I noticed is that even in some zero-knowledge systems, the server still receives an encrypted version of the user’s key.<p>I'm curious: are there any cloud storage systems where the encryption key <i>never</i> leaves the client device in any form?<p>Bonus question: what do people think about a system where users can reset passwords without losing access, by separating login credentials from encryption keys?<p>Would love to hear the community's thoughts.