Security Implementation.

Hello

We want to have few clarification:
1> Why should we provide the security functionality for the WAPGW. 
what type of security functionality is provided.

2> If we want to provide security what modifications should we 
have to do, for the WAPGW.

3> wtls provide security, in the kannel code there is wtls coding, 
if we want to implement wtls functionality, what configuration 
variables should we set.
please guide us for the following.

regards
Nigar