Cygwin ssh private key will be ignored bad permissions

It is recommended that your private key files are NOT accessible by others. This private key will be ignored. bad permissions:

http://www.cygwin.com/cygwin-ug-net/ntsec.html

On NTFS, file permissions are evaluated using the Access Control Lists (ACLs) attached to a file. This can be switched off by using the "noacl" option to the respective mount point in the /etc/fstab or /etc/fstab.d/$USER file. For more information on file permissions, see the section called “Using Windows security in Cygwin”.