Sidr.com has an SSL certificate but this does not mean that Sidr.com is a legitimate website.
You should always check before doing any online payment that the website has a SSL certificate (padlock shown in the address bar).
Domain trust report for Sidr.com:
|HOSTED IN:||United States|
Sidr.com was first registered 20 years 166 days ago.
Sidr.com has some age to the domain name which is a good sign.
Domain age: Few years old