@Thierry, the difference that I see between many authentication requests versus one request with many authentication methods, is that in the first case an operator may limit the rate at which requests are processed, but it's more difficult to protect Keystone against few requests triggering many authentication trials.
@Thierry, the difference that I see between many authentication requests versus one request with many authentication methods, is that in the first case an operator may limit the rate at which requests are processed, but it's more difficult to protect Keystone against few requests triggering many authentication trials.