How to give read only permission to the Public and Private keys for SFTP in Windows 10

In Linux command, chmod 400 file is used to protect a file against accidental overwriting. 

In windows you can use icacls command

https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/icacls

In this case, let see how to give read only permission to .pub file

C:\WINDOWS\system32>cd c:\Keys

c:\Keys>icacls.exe id_rsa.pub /reset

processed file: id_rsa.pub

Successfully processed 1 files; Failed processing 0 files

c:\Keys>icacls.exe id_rsa.pub /grant:r "%Username%":"(R)"

processed file: id_rsa.pub

Successfully processed 1 files; Failed processing 0 files

c:\Keys>icacls.exe id_rsa.pub /inheritance:r

processed file: id_rsa.pub

Successfully processed 1 files; Failed processing 0 files

You can do the same for Private key and share the Public key and your IP address to get permission from the SFTP host. Once the permission is granted check the connection.

c:\Keys>sftp -i id_rsa <SFTP username>@<SFTP Host IP>

c:\Keys>exit

Cheers!
Uma