Hi All I want to use the Digest AKAv1 and AKAv2 Authentication API to generate response for the different algorithms like MD5, AKAv1-MD5 and AKAv2-MD5. URL: (http://www.pjsip.org/pjsip/docs/html/group__PJSIP__AUTH__AKA__API.htm). Can anyone suggest me a suitable my own c code so that i can just use that respective API in my C code and pass the argument values needed for creating the response in the respective function and get the result. Since i am a new comer to the C platform. Plz help me. I really need this API to create response for my work. I have already compiled and run the pjproject1.0.1 successfully in my visual studio C++. Plz help. Regd's Sanjay