Openssh

Openssh is an SSH implementation designed for Windows environments. It provides secure shell access and file transfer capabilities on Windows systems, functioning as a port of the widely-used OpenSSH software originally developed for Unix-like operating systems.

Administrator Key Storage

A notable characteristic of Openssh for Windows is its handling of administrator authentication keys. Rather than using the standard .ssh/authorized_keys file location found in typical SSH implementations, Openssh on Windows stores administrator keys in C:/ProgramData/ssh/administrators_authorized_keys. This distinction reflects Windows’ different file system structure and permission model compared to Unix-based systems.

This alternative key storage location allows Openssh to integrate with Windows’ native security framework, where the ProgramData directory serves as a central location for application configuration and system-level data that requires elevated access privileges.

Source Notes