Wireless Sensor Networks (WSNs) will benefit from security frameworks that provide easy to use security while hiding inherent complexity. In comparison to traditional networks, the hardware constraints of wireless sensors demand that network security be configured based on application parameters, in order to provide the desired level of security while efficiently using available resources. Such a security framework is discussed in this paper, with special focus on security configuration, where a configuration methodology is presented in detail. The methodology is implemented as a Java tool with SQLite database backing, and to prove its validity, a sample application is presented and tested. Also, experimental proofs are provided to support the methodology, and the general necessity of configuring security for WSN applications.