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      <title>SSH密钥认证的隐形危机：为何你的私钥可能正在成为攻击者的通行证</title>
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      <description>从1995年Tatu Ylönen发明SSH协议，到2023年GitHub RSA密钥泄露事件，SSH密钥认证已经走过了三十年历程。本文深度剖析SSH密钥认证的安全困境：Ed25519与RSA的算法博弈、Agent转发攻击原理、证书认证的企业级方案、以及FIDO2硬件密钥的零信任实践。基于USENIX Security论文、Qualys安全公告、NIST SP 800-63标准等权威信源，揭示SSH密钥管理中的十大安全陷阱，以及从密钥蔓延（key sprawl）到证书权威（CA）架构的技术演进路径。</description>
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