Hello Ranjan,
With the latest releases of the SAP Single Sign-On 2.0 product we offer two-factor authentication with Time-Based One-Time Password solution. More information is available in this blog:
Strong Two-Factor Authentication with One-Time Password Solution
With the latest support package for SAP Single Sign-On 2.0 product we offer also risk based authentication solution. More details you will be able to find in my blog: Risk-Based Authentication for Your Critical Business Processes
Best Regards,
Donka Dimitrova