Jar for this class SecurityContextImpl

Hi All,

I am new to portal.

We have requirement to change language of portal, as per user selection from logon page.

We are using EP 7.3

I am following this blog Adding Logon Language option on Portal Logon Page

I am not able to find security.jar ,so in NWDS am getting error for this import

com.sap.engine.services.security.server.SecurityContextImpl

Can you tell me which jar i need to use and please tell me where to get specifying jar

Thanks in advance.

Thanks,

Preethi Ande