Unverified50% confidenceFactExact time
SSH密钥认证过程中私钥永远不离开本地设备，即便服务器被入侵，攻击者获得的公钥也无法反推私钥
1
Sources
50%
Confidence
Long-term
Relevance
7/12/2026
First Seen
Sources
Home Self-Hosting Server Setup Guide: Building a Private Cloud Ecosystem from Scratch
redditr/selfhosted7/11/2026
Related Claims
UnverifiedSSH key authentication is based on asymmetric encryption principles, where the private key is kept locally and the public key is uploaded to the server, with no password transmission throughout the process, making it more secure than HTTPS username and password authentication83% similarUnverifiedSSH密钥认证基于RSA（依赖大整数分解难题）或Ed25519（基于椭圆曲线离散对数难题）算法，私钥永远不离开本地设备77% similarUnverifiedWhen logging in with Passkeys, the server sends a random challenge, the device signs it with the private key and returns the result, and the server verifies the signature with the public key; since the private key is never transmitted, identity cannot be forged even if the server database is stolen.73% similarUnverifiedHardware security keys (such as YubiKey) implement the FIDO2/PIV protocol to ensure that private keys never leave the hardware device.71% similar
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