Windows uses a slightly different SSH key pair format. The public key must be
in the PUB format, and the private key must be in the
PPK format. On Windows, you can use PuTTYgen to create an SSH
key pair in the appropriate formats. You can also use PuTTYgen to convert a
private key generated using ssh-keygen to a
.ppk file.
Note
If you present WinSCP with a private key file not in
.ppk format, that client offers to convert the key
into .ppk format for you.
For a tutorial about creating SSH keys by using PuTTYgen on Windows, see the
SSH.com
website
