After a couple of weeks of Google Announcement "Gradually sensation SHA-1"<p>I have tested some most popular web sites still using SHA-1 certificate by using this tool https://www.sha2sslchecker.com<p>microsoft.com, google.com, facebook.com, linkedin.com, amazon.com, paypal.com, 2checkout.com – still using a SHA-1 certificate.<p>I am shocked that announcer and other big brands aren’t serious about security and using weak algorithm.