The only variable to consider when creating a context encryption key is the key length in bits. Longer keys are more secure but also perform somewhat slower.
It is only possible to use one key with the Blackboard Learning System at a time. If the context APIs are used to tie in more than one URL the same key will be used to encrypt communication for all the URLs.
Follow these steps to open the Create New Context Encryption Key page.
Step 1 Click Manage Context Encryption Keys from the Security and Integration section of the System Control Panel.
Step 2 Click Create New Context Encryption Key.
Select the key length from the drop-down list and click Submit to create a new key. If a key already exists, creating a new key will overwrite the existing key. Any URLs relying on the old key to decipher context passed from the Blackboard Learning System will not work until the new key is downloaded and made available to the URL.