Ability to enforce password requirements

I would like the ability to enforce minimum password security requirements in Confluence, for example:

"Password must be 8 characters or greater and must contain one of each of the following: Upper case letters, lower case letters, symbols, numbers."

I have implemented this in Jira using the info found here: http://jira.atlassian.com/browse/JRA-2740 so I'm assuming something similar can be implemented in Confluence. Please let me know if anyone has any thoughts.