Making Passwords Secure: Fixing the Weakest Link in Cybersecurity introduces the reader to a new Multi-Factor Authentication infrastructure call – Passwords Authentication Infrastructure (PAI).
Here are some resources to help you learn more about and implement PAI:
Access Smart, LLC http://www.access-smart.com/
CardLogix http://www.cardlogix.com/
CardWerk http://www.cardwerk.com/
National Cyber Security Alliance http://www.nationalsecurityalliance.net/
StaySafeOnline.org https://staysafeonline.org/
InformationWeek Dark Reader http://www.darkreading.com
PCI Security Standards Council https://www.pcisecuritystandards.org/


