Defcon.com has an SSL certificate but this does not mean that Defcon.com is a legitimate website.
Never carry out online transactions with websites unless they have a SSL certificate (padlock shown in the address bar).
Domain trust report for Defcon.com:
|HOSTED IN:||United States|
Defcon.com was first registered 26 years 128 days ago.
Defcon.com has some age to the domain name which is a good sign.
Domain age: Few years old