Customizing plone login for two factor authentication

I am new to plone and python.

But here comes a scenario where i want to customize an existing plone installation login to include two factor auth from Duo-Security. What is the easiest way to accomplish this ?

For this requirement,what are the areas i need to explore ?

If anyone has done this before,please give me s开发者_开发问答ome pointers.

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The authentication in Plone is very flexible and modular. After a short search I found out that there not a product that already provides this kind of auth, so you need to write a custom PAS (Pluggable Authentication Service) plugin.

More info:

• http://plone.org/documentation/manual/developer-manual/users-and-security/pluggable-authentication-service
• http://plone.org/documentation/manual/developer-manual/archetypes/appendix-practicals/b-org-creating-content-types-the-plone-2.5-way/writing-a-custom-pas-plug-in

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See PlonePAS.

Additionally, see the following packages as an example.

• https://github.com/collective/collective.googleauthenticator
• https://github.com/collective/collective.smsauthenticator