powershell ssh key permissions
# Set Key File Variable:
New-Variable -Name Key -Value "$env:UserProfile.sshid_rsa"
# Remove Inheritance:
Icacls $Key /c /t /Inheritance:d
# Set Ownership to Owner:
# Key's within $env:UserProfile:
Icacls $Key /c /t /Grant ${env:UserName}:F
# Key's outside of $env:UserProfile:
TakeOwn /F $Key
Icacls $Key /c /t /Grant:r ${env:UserName}:F
# Remove All Users, except for Owner:
Icacls $Key /c /t /Remove:g Administrator "Authenticated Users" BUILTINAdministrators BUILTIN Everyone System Users
# Verify:
Icacls $Key
# Remove Variable:
Remove-Variable -Name Key