TRUST A CERTIFICATE IN JAVA ON MAC OS X

First, export the cert using a web browser or whatever.  I used firefox, because it is easy, and I couldn’t figure out how to do it in chrome.  You should end up with a simple PEM encoded file.  Then here’s how you import it:

$ cd /System/Library/Java/Support/CoreDeploy.bundle/Contents/Home/lib/security
$ sudo cp cacerts cacerts.orig
$ sudo keytool -importcert -file your_cert_file_here -keystore cacerts

(Note: default keystore password is "changeit")

you’ll be prompted to trust it, then you are done.

or

$ sudo -i
# cd /Library/Java/Home
# keytool -import -trustcacerts -alias CAName -file CA.crt -keystore lib/security/cacerts


or

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If Java is installed on your computer, but you are still having problems with Java functionality in Blackboard (see Troubleshooting Java Issues in Blackboard), there might be a problem with the Java security certificate settings on your computer. Here are two things to look for, with tips to troubleshoot:

1. The application digital signature has not been allowed to run

When you login to Blackboard for the first time on a given computer, you are greeted with a prompt that reads "The application's digital signature has been verified. Do you want to run the application?" You must select "Run" for Java-driven functionality to work within Blackboard.

If you accidentally select "Cancel," you should be able to restart your browser and then login again. This will bring up the prompt, allowing you to select "Run."

When you select "Run," you tell your Java installation to trust the Java security certificate that Blackboard uses. That information is stored away so that you do not have to keep selecting "Run" every time you login

2. The certificate information stored on the comptuer does not match the current certificate

Every once in a while, the Java security certificate on Blackboard is renewed, which may cause problems if the certificate information stored on your comptuter does not match. To see if this is the case, you must clear out your stored Blackboard certificates in Java. Below are the steps for doing so.

Windows

Open a web browser and login to Blackboard. This will initiate Java on your computer.
Look for the Java icon located in the bottom-right corner of the Windows task bar.

3. Right click on the icon and select "Open Control Panel."

4. Once the control panel is open, select the "Security" tab.

5. Click the "Certificates" button. 

6.Highlight any certificates containing the word "blackboard" and click the "Remove" button.