I have been asked the 3 digit code when booking an airline ticket on a non-US site. During payment it passed through a amex safekey site which I think is kind o

I have been asked the 3 digit code when booking an airline ticket on a non-US site. During payment it passed through a amex safekey site which I think is kind of like 3d secure http://security.stackexchange.com/a/136296 http://security.stackexchange.com/a/136296