The challenges of the Internet of Things (IoT) sensor networks include connectivity, interoperability, security, and privacy. The Institute of Electrical and Electronics Engineers (IEEE) P1451.0 standard is being revised based on these challenges and requirements to achieve sensor data interoperability and security for IoT applications. This paper analyzes the security requirements of sensor networks for IoT applications and proposed security solutions for IEEE P1451.0-based IoT sensor networks. It specifies security policies and levels of IEEE P1451.0-based sensor networks to meet the security requirements and defines security transducer electronic data sheets (TEDS) to describe security protocol information for IEEE P1451.0-based sensor networks. An implementation of the security TEDS for IEEE P1451.0 and P1451.5-802.11 wireless sensor networks is provided to illustrate how to access security TEDS that contain detailed security parameters and information to achieve sensor data security and interoperability.