This Recommendation describes differentiated security service for secure mobile communication. The investigation of differentiated security service is important for both service providers and users. The service providers can use the differentiated security service to overcome rigorous circumstance of wireless access network and satisfy various users and service with different levels of security. The differentiated security service is realized by security policy with three layers. One layer is super security policy used as value added service that safeguards mobile communication with sensitive information. The second layer is baseline security policy used as prevalent service that satisfies mobile communication without sensitive information. The last layer is no security policy defined as the policy under which no security function is configured during communication.