Security Certificates

What are Security Certificates and what are they used for?

• Security Certificates are a method of establishing trust and encrypting communication between different entities on a network
  • An entity can be a person or a computer
  • Certificates are issued to each entity, much like an identification card might be issued to each member of an organization
  • Each Certificate must be signed by a Certificate Authority, often referred to as the CA
    • Every certificate signed by the CA will trust every other certificate that is also signed by the same CA
  • When two certificates trust each other, they can be used to encrypt a connection
    • This is especially important when transmitting a username and password across the internet
• Each service provided by Computerisms will use Security Certificates to encrypt network connections
• Sites you visit that have https:// in the address bar are secured by a certificate

So why do I get a Security Certificate Warning?

• Certificate warnings can be caused by several factors, but the most important thing to know is that just because you see a warning does not mean the site is not secured
• One possible reason for the Certificate Warning is that your computer does not know the origin of the certificate on the server
  • When you go to an https enable site that does not show the warning, it is because the certificate on the server and a certificate on your computer have been signed by the same CA
  • Since Computerisms doesn't pay the hefty fees to have its certificates signed by the same CA used by your computer, your computer will not trust the server's certificate
  • Since your computer cannot verify the origin of the certificate on the server, it cannot establish a trust relationship with the server
    • The warning will inform you that the certificate on the server cannot be trusted because its origins cannot be confirmed
    • Since you know the origins of the certificate (It comes from Computerisms), you can override your computer's paranoia
  • By temporarily overriding the warning, you instruct your computer to trust the certificate on the server
  • Once the trust is established, then the certificates can be used to encrypt the communication so your password is not transmitted in clear text
• Another reason a security certificate warning might pop up is a mismatched address
  • Computerisms Webmail is one site that answers to many names, such as https://webmail.domain.tld
  • If you arrive at the site by a name that is different than the one on the certificate, your computer will warn you about it.
• Remember, regardless of the warning, when you instruct your computer to trust the certificate, encryption will still happen so it is safe to send your passwords over the internet

• Certificates can be purchased for the server so the warning doesn't appear in your browser, but they are prohibitively expensive for our hosting environment
  • Certificates in general are very very expensive in proportion to the effort required to make them.
  • Computerisms can make certificates that will encrypt a connection every bit as good as a paid certificate for a small fraction of the cost
    • Certificates generated by Computerisms will not be automatically trusted by your computer, and therefor will always show you the certificate warning
• In the case of Computerisms and its customers, we can manually establish our trust, which in turn allows encryption of our passwords
  • Despite the warning, the encryption is still taking place on our system
    • Said another way: Security certificates are still securing your transmission, even though the warning might make you think otherwise.
• Computerisms Certificates can be installed on your machine in such a way that your computer will trust the Computerisms certficates
  • If you do not want to see the warning at every page, then please follow these instructions

Importing the Computerisms Certificate Authority

The easiest way to install a certificate is using Internet Explorer Open your start menu and choose "All Programs" In the list, right click Internet Explorer In the menu, choose "Run as Administrator" If you are presented with a window confirming the program should be allowed to make changes to your computer, select Yes
	Navigate to https://rc.domain.tld or any other encrypted Computerisms service Select "Continue to this website (not recommended) For the record, it is recommended...
In the next window, you will notice the address bar goes red. Click in the address bar where the X is displayed as a certificate warning
	In the small window that opens up, click the link at the bottom called "View certificates"
In the next window, find the tab called "Certification Path" and click it Click on the line that says Computerisms Certificate Authority Then click the "View Certificate" Buttonhelp.
	In the next window, click the button called "Install Certificate" Note: if you did not run Internet Explorer as Administrator, this button will not show up
The next window will be the start of the Certificate Import Wizard Click Next
	Move the Radio button to be beside "Place all Certificates in the following store" Click the browse button to open the navigation window In the navigation window, select "Trusted Root Certification Authorities" Click OK, then click Next
Click the Finish button
	Another warning window will pop up, click Yes in the bottom right corner
A window will pop up confirming the import was successful, click OK on that window Click OK on the Computerisms Certificate Authority Certificate Window Click OK on the first Certificate Window