Unverified50% confidenceFactExact time
The SSH client will refuse to use key files with group or other permission bits set (permissions must be no more permissive than 600); otherwise the connection is treated as insecure and terminated.
1
Sources
50%
Confidence
Long-term
Relevance
10/4/2026
First Seen
Sources
Related Entities
Related Claims
Unverified在类 Unix 系统中，SSH 协议规范要求私钥存放在 ~/.ssh/ 目录69% similarVerifiedSSH 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 authentication69% similarUnverifiedSSH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69% similarUnverified防御SSH暴力破解的有效手段包括禁用密码登录仅允许公钥认证、更改默认端口、部署fail2ban，以及通过VPN消除公网暴露66% similarUnverifiedThe core security risk of SSH agent forwarding is that once a remote host is compromised, an attacker can use the forwarded agent socket to impersonate the user and access other systems without ever touching the private key itself66% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/971471API
curl https://kongchang.com/api/v1/knowledge/claims/971471MCP
get_claim(id=971471)