Three layered secured access to the secure Wiki Server

Hi,

We are looking for a Non-USB three factor authentication biometric enabled OTP tokens and also two factor authentication Non-USB OTP tokens. We have our servers setup on the Mac platform. Our users are primarily on iPhones & iPads, USB functionality is not always available.

Our Server Details:
One VPN Server
One Proxy Server (Apple’s standard Mobile Access Service http://www.apple.com/server/macosx/features/mobile-access.html )
One Web Server ( Apple’s standard Wiki service http://www.apple.com/server/macosx/features/wiki-server.html )
Type of Servers : Apple Xserve’s
OS on the Server : Mac OS X Server 10.6.3 running Apache 2.2 web services with Open Directory LDAP Version 3 – which is very similar to the Active directory [ cn = hostname , cn = domain, cn = com ]

Workflow : Three layered secured access to the secure Wiki Server
1. First layer, User gains access to the VPN gateway through a Non-USB OTP hardware token – Server on the internet
2. Second layer, Mobile Access Server access through a Non-USB OTP hardware token. The requirement is to add a two factor authentication to this page. By design the Mobile Access service authenticates Open directory users to proxy traffic to the next server that holds actual data.
3. Third layer, Access to Web server through a Biometric enabled Non-USB OTP tokens, gains access the Secure Wiki service where the data are stored on the intranet site

Looking forward for your response at the earliest.

Regards,
Annu Babu